{"id":295297,"date":"2026-08-30T11:29:46","date_gmt":"2026-08-30T09:29:46","guid":{"rendered":"https:\/\/drain-master.de\/2026\/08\/30\/skladovani-a-pece-o-ph-elektrodu-5-nejdrazsich-chyb\/"},"modified":"2026-08-30T11:29:46","modified_gmt":"2026-08-30T09:29:46","slug":"skladovani-a-pece-o-ph-elektrodu-5-nejdrazsich-chyb","status":"publish","type":"post","link":"https:\/\/drain-master.de\/cs\/2026\/08\/30\/skladovani-a-pece-o-ph-elektrodu-5-nejdrazsich-chyb\/","title":{"rendered":"Skladov\u00e1n\u00ed a p\u00e9\u010de o pH elektrodu: 5 nejdra\u017e\u0161\u00edch chyb"},"content":{"rendered":"<article>\n<p class=\"intro\">V\u011bt\u0161ina pH elektrod se nezni\u010d\u00ed pou\u017e\u00edv\u00e1n\u00edm, ale mezi dv\u011bma m\u011b\u0159en\u00edmi. Sucho v \u0161upl\u00edku, \u201ezaparkovan\u00e1\u201c v destilovan\u00e9 vod\u011b nebo vyle\u0161t\u011bn\u00e1 do\u010dista had\u0159\u00edkem, t\u0159i dob\u0159e m\u00edn\u011bn\u00e9 \u00fakony, t\u0159i zp\u016fsoby, jak senzor p\u0159ed\u010dasn\u011b zab\u00edt.<\/p>\n<h2>Co vlastn\u011b dr\u017e\u00ed\u0161 v ruce<\/h2>\n<p>Na spodn\u00edm konci tv\u00e9ho m\u011b\u0159\u00e1ku jsou dv\u011b citliv\u00e9 sou\u010d\u00e1sti. Za prv\u00e9 <strong>sklen\u011bn\u00e1 membr\u00e1na<\/strong>: extr\u00e9mn\u011b tenk\u00e1 sklen\u011bn\u00e1 kuli\u010dka, jej\u00ed\u017e povrch pot\u0159ebuje vodou nasycenou bobtnaj\u00edc\u00ed vrstvu, aby v\u016fbec mohl m\u011b\u0159it. Kdy\u017e tahle vrstva vyschne, elektroda m\u011b\u0159\u00ed pomalu, uj\u00ed\u017ed\u00ed (driftuje) nebo kalibraci \u00fapln\u011b odm\u00edtne.<\/p>\n<p>Za druh\u00e9 <strong>diafragma<\/strong>: drobn\u00e9 por\u00e9zn\u00ed m\u00edsto v t\u011ble elektrody, p\u0159es kter\u00e9 m\u00e1 referen\u010dn\u00ed \u010d\u00e1st kontakt se vzorkem. V\u011bt\u0161inou je vid\u011bt jako sv\u011btl\u00fd bod nebo krou\u017eek. Kdy\u017e se ucpe, elektrick\u00fd obvod se zhrout\u00ed, hodnoty jsou nestabiln\u00ed a \u201euj\u00ed\u017ed\u011bj\u00ed\u201c, i kdy\u017e sklo vypad\u00e1 bezchybn\u011b.<\/p>\n<p>Ob\u011b \u010d\u00e1sti pot\u0159ebuj\u00ed tot\u00e9\u017e: <strong>ionty a vlhkost<\/strong>. A p\u0159esn\u011b to dod\u00e1 roztok chloridu draseln\u00e9ho.<\/p>\n<h2>Nejd\u016fle\u017eit\u011bj\u0161\u00ed v\u011bta hned na za\u010d\u00e1tek: nikdy neskladuj v destilovan\u00e9 vod\u011b<\/h2>\n<p>Tohle je chyba, kterou ud\u011bl\u00e1 skoro ka\u017ed\u00fd, proto\u017ee to zn\u00ed spr\u00e1vn\u011b. Destilovan\u00e1 a demineralizovan\u00e1 voda je chud\u00e1 na ionty, <em>chce<\/em> je nas\u00e1t. Kdy\u017e v n\u00ed elektroda stoj\u00ed, voda p\u0159es diafragmu vytahuje elektrolyt z jej\u00edho vnit\u0159ku. Referen\u010dn\u00ed \u010d\u00e1st se vy\u010derp\u00e1 a to, co pak m\u011b\u0159\u00ed\u0161, jsou pomalu uj\u00ed\u017ed\u011bj\u00edc\u00ed \u010d\u00edsla bez opory.<\/p>\n<p>Ani voda z kohoutku nen\u00ed \u0159e\u0161en\u00ed: obsahuje l\u00e1tky zp\u016fsobuj\u00edc\u00ed tvrdost a m\u00e1 vlastn\u00ed pH, kter\u00e9 membr\u00e1nu b\u011bhem t\u00fddn\u016f m\u011bn\u00ed.<\/p>\n<p><strong>Spr\u00e1vn\u011b je 3mol\u00e1rn\u00ed roztok chloridu draseln\u00e9ho (3M KCl).<\/strong> Udr\u017e\u00ed bobtnaj\u00edc\u00ed vrstvu vlhkou, diafragmu pr\u016fchodnou a referen\u010dn\u00ed \u010d\u00e1st v rovnov\u00e1ze.<\/p>\n<div class=\"woocommerce columns-1 \"><ul class=\"products columns-1\">\n<li class=\"product type-product post-85420 status-publish first onbackorder product_cat-reseni product_cat-hodnota-ph has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/drain-master.de\/cs\/produkt\/roztok-pro-skladovani-elektrod-apera-3m-kcl-250ml\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-image__wrapper\"><a href=\"https:\/\/drain-master.de\/cs\/produkt\/roztok-pro-skladovani-elektrod-apera-3m-kcl-250ml\/\" title=\"Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"shoptimizer-plp-carousel-container\"><div class=\"shoptimizer-plp-image-wrapper\"><img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl\" srcset=\"https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-300x300.jpg 300w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-600x600.jpg 600w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-1024x1024.jpg 1024w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-768x768.jpg 768w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-1536x1536.jpg 1536w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-990x990.jpg 990w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-441x441.jpg 441w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-100x100.jpg 100w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-800x800.jpg 800w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL-150x150.jpg 150w, https:\/\/drain-master.de\/wp-content\/uploads\/2024\/07\/apera_3M_KCL.jpg 2000w\" sizes=\"(max-width: 360px) 147px, (max-width: 300px) 100vw, 300px\" \/>\t\t\t\n\t<\/div><\/div><\/a><\/div><div class=\"woocommerce-card__header\">\t\t\t\t\t\t<p class=\"product__categories\"><a href=\"https:\/\/drain-master.de\/cs\/produkt-kategorie\/merici-zarizeni\/reseni\/\" rel=\"tag\">Kalibra\u010dn\u00ed roztoky<\/a>, <a href=\"https:\/\/drain-master.de\/cs\/produkt-kategorie\/merici-zarizeni\/hodnota-ph\/\" rel=\"tag\">pH metry<\/a><\/p>\t\t\t\t<div class=\"woocommerce-loop-product__title\"><a tabindex=\"0\" href=\"https:\/\/drain-master.de\/cs\/produkt\/roztok-pro-skladovani-elektrod-apera-3m-kcl-250ml\/\" aria-label=\"Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml<\/a><\/div><\/a><p class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>12,40&nbsp;<span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span><\/bdi><\/span><\/p><\/a><a href=\"\/cs\/wp-json\/wp\/v2\/posts\/295297?add-to-cart=85420\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_85420\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"85420\" data-product_sku=\"28APE190316\" aria-label=\"P\u0159idat do ko\u0161\u00edku: &ldquo;Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml&rdquo;\" rel=\"nofollow\" data-success_message=\"&ldquo;Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml&rdquo; byl p\u0159id\u00e1n do ko\u0161\u00edku\" role=\"button\">P\u0159idat do ko\u0161\u00edku<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_85420\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t<input type=\"hidden\" class=\"pmwProductId\" data-id=\"85420\">\n\t\t\t\t\t<script data-cfasync=\"false\">\n\t\t\t(window.pmwDataLayer = window.pmwDataLayer || {}).products                = window.pmwDataLayer.products || {};\n\t\t\twindow.pmwDataLayer.products[85420] = {\"id\":\"85420\",\"sku\":\"28APE190316\",\"price\":12.4,\"brand\":\"Apera Instruments\",\"quantity\":1,\"dyn_r_ids\":{\"post_id\":\"85420\",\"sku\":\"28APE190316\",\"gpf\":\"woocommerce_gpf_85420\",\"gla\":\"gla_85420\",\"dm_de_post_id\":\"85060\"},\"is_variable\":false,\"type\":\"simple\",\"name\":\"Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml\",\"category\":[\"Kalibra\u010dn\u00ed roztoky\",\"pH metry\"],\"is_variation\":false};\n\t\t\t\t\twindow.pmw_product_position = window.pmw_product_position || 1;\n\t\twindow.pmwDataLayer.products[85420]['position'] = window.pmw_product_position++;\n\t\t\t\t<\/script>\n\t\t<\/div><\/li>\n<\/ul>\n<\/div>\n<h2>Jak spr\u00e1vn\u011b skladovat<\/h2>\n<ol>\n<li><strong>Kr\u00e1tk\u00e9 pauzy (hodiny a\u017e dny):<\/strong> P\u00e1r kapek <a href=\"https:\/\/drain-master.de\/cs\/produkt\/roztok-pro-skladovani-elektrod-apera-3m-kcl-250ml\/\">Roztok pro skladov\u00e1n\u00ed elektrod Apera 3M KCl 250ml<\/a> do ochrann\u00e9 krytky, nasadit krytku, hotovo. D\u016fle\u017eit\u00e9 je, aby byla kuli\u010dka i diafragma smo\u010den\u00e9.<\/li>\n<li><strong>Del\u0161\u00ed pauzy (t\u00fddny a\u017e m\u011bs\u00edce):<\/strong> Skladuj stejn\u011b, ale tekutinu pravideln\u011b kontroluj. Odpa\u0159uje se a ka\u017ed\u00e9 \u010dty\u0159i a\u017e \u0161est m\u011bs\u00edc\u016f ji mus\u00ed\u0161 vym\u011bnit. Sta\u010d\u00ed mrknout p\u0159i v\u00fdm\u011bn\u011b baterie.<\/li>\n<li><strong>V\u017edy svisle.<\/strong> Diafragma mus\u00ed b\u00fdt cel\u00e9 pono\u0159en\u00e9 v tekutin\u011b. Kdy\u017e elektroda le\u017e\u00ed na boku, vyschne p\u0159esn\u011b to m\u00edsto, na kter\u00e9m z\u00e1le\u017e\u00ed.<\/li>\n<li><strong>\u017d\u00e1dn\u00fd mr\u00e1z, \u017e\u00e1dn\u00e9 topen\u00ed.<\/strong> Ide\u00e1ln\u00ed je pokojov\u00e1 teplota. Kdy\u017e roztok zmrzne, roztrhne sklen\u011bnou membr\u00e1nu.<\/li>\n<\/ol>\n<p>I kdy\u017e elektroda navzdory v\u0161emu vyschla, je\u0161t\u011b nen\u00ed v\u0161echno ztracen\u00e9: Dej ji na n\u011bkolik hodin, v pochybnostech p\u0159es noc, do roztoku KCl a pak znovu kalibruj. Po kr\u00e1tk\u00e9m vyschnut\u00ed se \u010dasto \u00fapln\u011b vzpamatuje. Po t\u00fddnech v suchu obvykle z\u016fstane zbytkov\u00e1 \u201elenost\u201c reakce.<\/p>\n<h2>\u010ci\u0161t\u011bn\u00ed: p\u0159ikl\u00e1dej, ned\u0159i<\/h2>\n<p>Po ka\u017ed\u00e9m m\u011b\u0159en\u00ed se elektroda opl\u00e1chne destilovanou vodou, na <em>oplach<\/em> je p\u0159esn\u011b spr\u00e1vn\u00e1, jen ne na skladov\u00e1n\u00ed. Potom ji jemn\u011b <strong>osu\u0161\u00ed\u0161 p\u0159ikl\u00e1d\u00e1n\u00edm<\/strong> m\u011bkk\u00fdm, nepou\u0161t\u011bj\u00edc\u00edm vl\u00e1knem had\u0159\u00edkem.<\/p>\n<p>Drhnut\u00ed je zak\u00e1zan\u00e9, a to ze dvou d\u016fvod\u016f: zanech\u00e1 jemn\u00e9 \u0161kr\u00e1bance ve skle a membr\u00e1nu staticky nabije. Staticky nabit\u00e1 elektroda ukazuje hodnoty, kter\u00e9 se minuty \u201etoulaj\u00ed\u201c, typick\u00e1 z\u00e1vada, kterou lid\u00e9 hromadn\u011b pova\u017euj\u00ed za \u201evadn\u00fd p\u0159\u00edstroj\u201c.<\/p>\n<p>U odoln\u00fdch usazenin pom\u016f\u017ee podle p\u0159\u00ed\u010diny:<\/p>\n<ul>\n<li><strong>\u2705 Hnojivov\u00e9 soli a vodn\u00ed k\u00e1men:<\/strong> kr\u00e1tce do z\u0159ed\u011bn\u00e9 kyseliny, pak d\u016fkladn\u011b opl\u00e1chnout a n\u011bkolik hodin regenerovat v roztoku KCl.<\/li>\n<li><strong>\u2705 Mastn\u00e9 a olejov\u00e9 filmy:<\/strong> jemn\u00fd prost\u0159edek na n\u00e1dob\u00ed v tepl\u00e9 vod\u011b, potom d\u016fkladn\u011b opl\u00e1chnout \u010distou vodou.<\/li>\n<li><strong>\u2705 Organick\u00e9 povlaky a biofilm:<\/strong> b\u011b\u017en\u00fd \u010distic\u00ed roztok na elektrody. Nic mechanicky ne\u0161kr\u00e1bat.<\/li>\n<\/ul>\n<p>Po ka\u017ed\u00e9m \u010di\u0161t\u011bn\u00ed plat\u00ed bez v\u00fdjimky: <a href=\"https:\/\/drain-master.de\/cs\/2026\/08\/30\/jak-kalibrovat-ph-metr-navod-v-6-krocich\/\">znovu kalibrovat<\/a>. Vy\u010di\u0161t\u011bn\u00e1 elektroda m\u00e1 jin\u00e9 parametry ne\u017e \u0161pinav\u00e1, na kterou byl tv\u016fj p\u0159\u00edstroj naposledy nastaven\u00fd.<\/p>\n<h2>Jak pozn\u00e1\u0161, \u017ee je \u010das na novou<\/h2>\n<p>pH elektroda je spot\u0159eb\u00e1k a p\u0159i dobr\u00e9 p\u00e9\u010di typicky vydr\u017e\u00ed jeden a\u017e dva roky. Pro v\u00fdm\u011bnu mluv\u00ed tyhle \u010dty\u0159i sign\u00e1ly:<\/p>\n<ul>\n<li><strong>\u2705 Kalibrace opakovan\u011b selh\u00e1v\u00e1<\/strong> nebo p\u0159\u00edstroj hl\u00e1s\u00ed chybu, i kdy\u017e jsou pufry \u010derstv\u00e9.<\/li>\n<li><strong>\u2705 Hodnota se ustaluje v\u011b\u010dnost,<\/strong> v\u00fdrazn\u011b d\u00e9le ne\u017e d\u0159\u00edv u stejn\u00e9ho vzorku.<\/li>\n<li><strong>\u2705 Displej \u201eposkakuje\u201c<\/strong> a ani po minut\u00e1ch se neuklidn\u00ed, i kdy\u017e jsi \u010dist\u011b opl\u00e1chl.<\/li>\n<li><strong>\u2705 Diafragma z\u016fst\u00e1v\u00e1 zabarven\u00e9<\/strong> nebo ucpan\u00e9 i po \u010di\u0161t\u011bn\u00ed a regeneraci.<\/li>\n<\/ul>\n<p>Ne\u017e ji ale vyhod\u00ed\u0161, v\u017edycky nejd\u0159\u00edv zkontroluj jednoduch\u00e9 p\u0159\u00ed\u010diny: star\u00fd pufr, oplachov\u00e1n\u00ed vodou z kohoutku, p\u0159\u00edli\u0161 studen\u00fd vzorek. Tyhle t\u0159i v\u011bci vysv\u011btl\u00ed v\u00edc domn\u011bl\u00fdch \u201epo\u0161kozen\u00ed elektrody\u201c ne\u017e skute\u010dn\u00e9 opot\u0159eben\u00ed.<\/p>\n<h2>Vym\u011bnit m\u00edsto vyhodit<\/h2>\n<p>Tady se uk\u00e1\u017ee, jak\u00fd p\u0159\u00edstroj sis koupil. U <a href=\"https:\/\/drain-master.de\/cs\/produkt\/ph20-value-ph-pocket-meter\/\">Kapesn\u00ed pH metr Apera PH20 Value<\/a> je elektroda napevno, na konci \u017eivotnosti je na odpis cel\u00fd p\u0159\u00edstroj. U \u0159ady 60 ji od\u0161roubuje\u0161 a nasad\u00ed\u0161 novou:<\/p>\n<ul>\n<li>pro PH60: <a href=\"https:\/\/drain-master.de\/cs\/produkt\/nahradni-ph-elektroda-apera-pro-ph60-ph60-e\/\">N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)<\/a><\/li>\n<li>pro PC60-Z: <a href=\"https:\/\/drain-master.de\/cs\/produkt\/pc60-de-nahradni-elektroda-pro-pc60-z\/\">N\u00e1hradn\u00ed elektroda Apera PC60-DE (pro PC60-Z)<\/a><\/li>\n<\/ul>\n<p>P\u0159esn\u011b proto se p\u0159\u00edplatek za pr\u00e9miovou t\u0159\u00eddu pro ty, kdo m\u011b\u0159\u00ed \u010dasto, vyplat\u00ed, cel\u00e9 po\u010dty najde\u0161 v <a href=\"https:\/\/drain-master.de\/cs\/2026\/08\/30\/apera-ph20-nebo-ph60-uprimne-srovnani\/\">srovn\u00e1n\u00ed PH20 vs. PH60<\/a>.<\/p>\n<div class=\"woocommerce columns-1 \"><ul class=\"products columns-1\">\n<li class=\"product type-product post-101352 status-publish first instock product_cat-hodnota-ph product_cat-merici-zarizeni has-post-thumbnail sale taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/drain-master.de\/cs\/produkt\/nahradni-ph-elektroda-apera-pro-ph60-ph60-e\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-image__wrapper\"><a href=\"https:\/\/drain-master.de\/cs\/produkt\/nahradni-ph-elektroda-apera-pro-ph60-ph60-e\/\" title=\"N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\n\t\n\t<div class=\"shoptimizer-plp-carousel-container\"><div class=\"shoptimizer-plp-image-wrapper\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/drain-master.de\/wp-content\/uploads\/2025\/02\/PH60_Probe-2-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"PH60-E 28APE190034\" srcset=\"https:\/\/drain-master.de\/wp-content\/uploads\/2025\/02\/PH60_Probe-2-300x300.png 300w, https:\/\/drain-master.de\/wp-content\/uploads\/2025\/02\/PH60_Probe-2-441x441.png 441w, https:\/\/drain-master.de\/wp-content\/uploads\/2025\/02\/PH60_Probe-2-100x100.png 100w, https:\/\/drain-master.de\/wp-content\/uploads\/2025\/02\/PH60_Probe-2-150x150.png 150w, https:\/\/drain-master.de\/wp-content\/uploads\/2025\/02\/PH60_Probe-2.png 600w\" sizes=\"(max-width: 360px) 147px, (max-width: 300px) 100vw, 300px\" \/>\t\t\t\n\t<\/div><\/div><\/a><\/div><div class=\"woocommerce-card__header\">\t\t\t\t\t\t<p class=\"product__categories\"><a href=\"https:\/\/drain-master.de\/cs\/produkt-kategorie\/merici-zarizeni\/hodnota-ph\/\" rel=\"tag\">pH metry<\/a>, <a href=\"https:\/\/drain-master.de\/cs\/produkt-kategorie\/merici-zarizeni\/\" rel=\"tag\">pH a EC metry<\/a><\/p>\t\t\t\t<div class=\"woocommerce-loop-product__title\"><a tabindex=\"0\" href=\"https:\/\/drain-master.de\/cs\/produkt\/nahradni-ph-elektroda-apera-pro-ph60-ph60-e\/\" aria-label=\"N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)<\/a><\/div><\/a><p class=\"price\"><del aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><bdi>51,17&nbsp;<span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span><\/bdi><\/span><\/del> <span class=\"screen-reader-text\">P\u016fvodn\u00ed cena byla: 51,17&nbsp;&euro;.<\/span><ins aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><bdi>49,99&nbsp;<span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span><\/bdi><\/span><\/ins><span class=\"screen-reader-text\">Aktu\u00e1ln\u00ed cena je: 49,99&nbsp;&euro;.<\/span><\/p><\/a><a href=\"\/cs\/wp-json\/wp\/v2\/posts\/295297?add-to-cart=101352\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_101352\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"101352\" data-product_sku=\"28APE190034\" aria-label=\"P\u0159idat do ko\u0161\u00edku: &ldquo;N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)&rdquo;\" rel=\"nofollow\" data-success_message=\"&ldquo;N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)&rdquo; byl p\u0159id\u00e1n do ko\u0161\u00edku\" role=\"button\">P\u0159idat do ko\u0161\u00edku<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_101352\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t<input type=\"hidden\" class=\"pmwProductId\" data-id=\"101352\">\n\t\t\t\t\t<script data-cfasync=\"false\">\n\t\t\t(window.pmwDataLayer = window.pmwDataLayer || {}).products                = window.pmwDataLayer.products || {};\n\t\t\twindow.pmwDataLayer.products[101352] = {\"id\":\"101352\",\"sku\":\"28APE190034\",\"price\":49.99,\"brand\":\"\",\"quantity\":1,\"dyn_r_ids\":{\"post_id\":\"101352\",\"sku\":\"28APE190034\",\"gpf\":\"woocommerce_gpf_101352\",\"gla\":\"gla_101352\",\"dm_de_post_id\":\"101350\"},\"is_variable\":false,\"type\":\"simple\",\"name\":\"N\u00e1hradn\u00ed pH elektroda Apera pro PH60 (PH60-E)\",\"category\":[\"pH metry\",\"pH a EC metry\"],\"is_variation\":false};\n\t\t\t\t\twindow.pmw_product_position = window.pmw_product_position || 1;\n\t\twindow.pmwDataLayer.products[101352]['position'] = window.pmw_product_position++;\n\t\t\t\t<\/script>\n\t\t<\/div><\/li>\n<\/ul>\n<\/div>\n<h2>Rutina p\u00e9\u010de v kostce<\/h2>\n<ul>\n<li><strong>Po ka\u017ed\u00e9m m\u011b\u0159en\u00ed:<\/strong> opl\u00e1chnout destilovanou vodou, osu\u0161it p\u0159ikl\u00e1d\u00e1n\u00edm, nasadit krytku s roztokem KCl.<\/li>\n<li><strong>P\u0159ed ka\u017ed\u00fdm m\u011b\u0159ic\u00edm dnem:<\/strong> vizu\u00e1ln\u00ed kontrola, je krytka vlhk\u00e1, je sklo \u010dist\u00e9, je diafragma sv\u011btl\u00e9?<\/li>\n<li><strong>Ka\u017ed\u00e9 4 a\u017e 6 m\u011bs\u00edc\u016f:<\/strong> vym\u011bnit roztok KCl v krytce.<\/li>\n<li><strong>Po \u010di\u0161t\u011bn\u00ed, v\u00fdm\u011bn\u011b nebo dlouh\u00e9 pauze:<\/strong> v\u017edy znovu kalibrovat.<\/li>\n<li><strong>Nikdy:<\/strong> neskladovat nasucho, neskladovat v destilovan\u00e9 vod\u011b, nedrhnout sklo, nepou\u017e\u00edvat elektrodu jako m\u00edch\u00e1tko.<\/li>\n<\/ul>\n<p>A proto\u017ee ani nejlep\u0161\u00ed p\u00e9\u010de o elektrodu nepom\u016f\u017ee, kdy\u017e je vzorek k ni\u010demu: DrainMaster zachyt\u00ed tv\u016fj odtokov\u00fd (drain) roztok \u010dist\u011b, tak\u017ee si m\u016f\u017ee\u0161 odebrat \u010derstv\u00fd vzorek, m\u00edsto abys m\u011b\u0159il z podmisky pln\u00e9 usazenin. Jak to vypad\u00e1, ukazuje \u010dl\u00e1nek  <a href=\"https:\/\/drain-master.de\/cs\/2026\/04\/12\/kontroluj-odtok-drain-u-konopi-snadno-a-rychle\/\">Kontroluj odtok (drain) u konop\u00ed<\/a>.<\/p>\n<div class=\"woocommerce columns-1 \"><ul class=\"products columns-1\">\n<li class=\"product type-product post-7400 status-publish first instock product_cat-podlozka product_cat-zahradni-potreby has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/drain-master.de\/cs\/produkt\/stojan-na-odkapavani-drainmaster\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-image__wrapper\"><a href=\"https:\/\/drain-master.de\/cs\/produkt\/stojan-na-odkapavani-drainmaster\/\" title=\"DrainMaster v\u010d. z\u00e1chytn\u00e9 vany (konfigurovateln\u00e1 velikost sady)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"shoptimizer-plp-carousel-container\"><div class=\"shoptimizer-plp-image-wrapper\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"DrainMaster Jednotliv\u00e1 sada\" srcset=\"https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-300x300.jpg 300w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-1019x1024.jpg 1019w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-768x771.jpg 768w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-1529x1536.jpg 1529w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-990x994.jpg 990w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-441x443.jpg 441w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-100x100.jpg 100w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2-150x151.jpg 150w, https:\/\/drain-master.de\/wp-content\/uploads\/2023\/04\/DrainMaster-Set_2.jpg 1991w\" sizes=\"(max-width: 360px) 147px, (max-width: 300px) 100vw, 300px\" \/>\t\t\t\n\t<\/div><\/div><\/a><\/div><div class=\"woocommerce-card__header\">\t\t\t\t\t\t<p class=\"product__categories\"><a href=\"https:\/\/drain-master.de\/cs\/produkt-kategorie\/zahradni-potreby\/podlozka\/\" rel=\"tag\">Podmisky pod kv\u011btin\u00e1\u010de<\/a>, <a href=\"https:\/\/drain-master.de\/cs\/produkt-kategorie\/zahradni-potreby\/\" rel=\"tag\">P\u011bstitelsk\u00e9 p\u0159\u00edslu\u0161enstv\u00ed<\/a><\/p>\t\t\t\t<div class=\"woocommerce-loop-product__title\"><a tabindex=\"0\" href=\"https:\/\/drain-master.de\/cs\/produkt\/stojan-na-odkapavani-drainmaster\/\" aria-label=\"DrainMaster v\u010d. z\u00e1chytn\u00e9 vany (konfigurovateln\u00e1 velikost sady)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">DrainMaster v\u010d. z\u00e1chytn\u00e9 vany (konfigurovateln\u00e1 velikost sady)<\/a><\/div><\/a><p class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>21,99&nbsp;<span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span><\/bdi><\/span><\/p><\/a><a href=\"\/cs\/wp-json\/wp\/v2\/posts\/295297?add-to-cart=7400\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_7400\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"7400\" data-product_sku=\"DM-01\" aria-label=\"P\u0159idat do ko\u0161\u00edku: &ldquo;DrainMaster v\u010d. z\u00e1chytn\u00e9 vany (konfigurovateln\u00e1 velikost sady)&rdquo;\" rel=\"nofollow\" data-success_message=\"&ldquo;DrainMaster v\u010d. z\u00e1chytn\u00e9 vany (konfigurovateln\u00e1 velikost sady)&rdquo; byl p\u0159id\u00e1n do ko\u0161\u00edku\" role=\"button\">P\u0159idat do ko\u0161\u00edku<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_7400\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t<input type=\"hidden\" class=\"pmwProductId\" data-id=\"7400\">\n\t\t\t\t\t<script data-cfasync=\"false\">\n\t\t\t(window.pmwDataLayer = window.pmwDataLayer || {}).products                = window.pmwDataLayer.products || {};\n\t\t\twindow.pmwDataLayer.products[7400] = {\"id\":\"7400\",\"sku\":\"DM-01\",\"price\":21.99,\"brand\":\"\",\"quantity\":1,\"dyn_r_ids\":{\"post_id\":\"7400\",\"sku\":\"DM-01\",\"gpf\":\"woocommerce_gpf_7400\",\"gla\":\"gla_7400\",\"dm_de_post_id\":\"1813\"},\"is_variable\":false,\"type\":\"simple\",\"name\":\"DrainMaster v\u010d. z\u00e1chytn\u00e9 vany (konfigurovateln\u00e1 velikost sady)\",\"category\":[\"Podmisky pod kv\u011btin\u00e1\u010de\",\"P\u011bstitelsk\u00e9 p\u0159\u00edslu\u0161enstv\u00ed\"],\"is_variation\":false};\n\t\t\t\t\twindow.pmw_product_position = window.pmw_product_position || 1;\n\t\twindow.pmwDataLayer.products[7400]['position'] = window.pmw_product_position++;\n\t\t\t\t<\/script>\n\t\t<\/div><\/li>\n<\/ul>\n<\/div>\n<h2>\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Pro\u010d nesm\u00edm pH elektrodu skladovat v destilovan\u00e9 vod\u011b?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">Destilovan\u00e1 voda je chud\u00e1 na ionty, a proto p\u0159es diafragmu vytahuje elektrolyt z vnit\u0159ku elektrody. Referen\u010dn\u00ed \u010d\u00e1st se vy\u010derp\u00e1, m\u011b\u0159en\u00e9 hodnoty driftuj\u00ed a elektroda st\u00e1rne v\u00fdrazn\u011b rychleji. Na oplach je destilovan\u00e1 voda p\u0159esn\u011b spr\u00e1vn\u00e1, na skladov\u00e1n\u00ed pat\u0159\u00ed do ochrann\u00e9 krytky 3mol\u00e1rn\u00ed roztok KCl.<\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Moje elektroda vyschla, je po n\u00ed?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">Ne nutn\u011b. Dej ji na n\u011bkolik hodin, v pochybnostech p\u0159es noc, do 3M roztoku KCl a potom znovu ud\u011blej dvoubodovou kalibraci. Kdy\u017e byla such\u00e1 jen kr\u00e1tce, v\u011bt\u0161inou se \u00fapln\u011b vzpamatuje. Po t\u00fddnech v suchu \u010dasto z\u016fstane pomal\u00e1 reakce, kterou u\u017e kalibrac\u00ed neodstran\u00ed\u0161.<\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Jak \u010dasto mus\u00edm m\u011bnit skladovac\u00ed roztok?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">Ka\u017ed\u00e9 \u010dty\u0159i a\u017e \u0161est m\u011bs\u00edc\u016f, a hned, jakmile se zakal\u00ed, objev\u00ed se vlo\u010dky nebo je viditeln\u011b odpa\u0159en\u00fd. Krytka je mal\u00e1, mno\u017estv\u00ed tekutiny tomu odpov\u00edd\u00e1, proto se vyplat\u00ed mrknout p\u0159i ka\u017ed\u00e9 v\u00fdm\u011bn\u011b baterie. Dolit\u00ed stoj\u00ed p\u00e1r korun, nov\u00e1 elektroda n\u00e1sobn\u011b v\u00edc.<\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Co je diafragma a pro\u010d se ucp\u00e1v\u00e1?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">Diafragma je mal\u00e9 por\u00e9zn\u00ed m\u00edsto v t\u011ble elektrody, p\u0159es kter\u00e9 m\u00e1 referen\u010dn\u00ed \u010d\u00e1st kontakt se vzorkem, obvykle je vid\u011bt jako sv\u011btl\u00fd bod nebo krou\u017eek. Soli, vodn\u00ed k\u00e1men, tuky nebo biofilm mohou p\u00f3ry ucpat a hodnoty pak jsou nestabiln\u00ed. Podle p\u0159\u00ed\u010diny pom\u016f\u017ee z\u0159ed\u011bn\u00e1 kyselina, jemn\u00fd prost\u0159edek na n\u00e1dob\u00ed nebo \u010distic\u00ed roztok; potom n\u011bkolik hodin regenerace v KCl.<\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">M\u016f\u017eu sklen\u011bnou membr\u00e1nu ot\u0159\u00edt had\u0159\u00edkem?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">P\u0159ikl\u00e1dat ano, drhnout ne. Drhnut\u00ed zanech\u00e1 jemn\u00e9 \u0161kr\u00e1bance a sklo staticky nabije. Staticky nabit\u00e1 membr\u00e1na ukazuje hodnoty, kter\u00e9 se minuty \u201etoulaj\u00ed\u201c, typick\u00e1 z\u00e1vada, kterou lid\u00e9 \u010dasto pova\u017euj\u00ed za poruchu p\u0159\u00edstroje. Vezmi m\u011bkk\u00fd, nepou\u0161t\u011bj\u00edc\u00ed vl\u00e1knem had\u0159\u00edk a jen odsaj zbytkovou vlhkost.<\/p>\n<\/details>\n<details style=\"border: 1px solid #e5e7eb; border-radius: 8px; margin-bottom: 8px; overflow: hidden;\">\n<summary style=\"padding: 14px 18px; cursor: pointer; font-weight: 600; font-size: 1.05em; background: #fafafa; list-style: none;\">Jak dlouho vydr\u017e\u00ed pH elektroda p\u0159i dobr\u00e9 p\u00e9\u010di?<\/summary>\n<p style=\"padding: 14px 18px; margin: 0; color: #555; line-height: 1.6; border-top: 1px solid #e5e7eb;\">Z praxe jeden a\u017e dva roky. Rozhoduje skladov\u00e1n\u00ed v roztoku KCl, oplach po ka\u017ed\u00e9m pou\u017eit\u00ed a typ vzork\u016f, siln\u011b zat\u00ed\u017een\u00e1 nebo hork\u00e1 m\u00e9dia \u017eivotnost znateln\u011b zkracuj\u00ed. Apera d\u00e1v\u00e1 na elektrodu z\u00e1ruku \u0161est m\u011bs\u00edc\u016f a na m\u011b\u0159\u00e1k dva roky.<\/p>\n<\/details>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>V\u011bt\u0161ina pH elektrod neum\u00edr\u00e1 na opot\u0159eben\u00ed, ale na \u0161patn\u00e9 skladov\u00e1n\u00ed. Co sklen\u011bn\u00e1 membr\u00e1na doopravdy pot\u0159ebuje \u2013 a kter\u00e9 dob\u0159e m\u00edn\u011bn\u00e9 \u00fakony ji zni\u010d\u00ed.<\/p>\n","protected":false},"author":1,"featured_media":295373,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Skladov\u00e1n\u00ed a p\u00e9\u010de o pH elektrodu: 5 nejdra\u017e\u0161\u00edch chyb","rank_math_description":"Jak pH elektrodu spr\u00e1vn\u011b skladovat: pro\u010d destilovan\u00e1 voda elektrodu ni\u010d\u00ed, jak uvolnit diafragmu a podle \u010deho pozn\u00e1\u0161, \u017ee je \u010das na v\u00fdm\u011bnu.","rank_math_focus_keyword":"Skladov\u00e1n\u00ed pH elektrody","footnotes":""},"categories":[487],"tags":[],"class_list":["post-295297","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-cs"],"_links":{"self":[{"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/posts\/295297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/comments?post=295297"}],"version-history":[{"count":0,"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/posts\/295297\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/media\/295373"}],"wp:attachment":[{"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/media?parent=295297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/categories?post=295297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/drain-master.de\/cs\/wp-json\/wp\/v2\/tags?post=295297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}