{"id":706,"date":"2010-10-18T15:47:43","date_gmt":"2010-10-18T22:47:43","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T07:00:00","slug":"706","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/706","title":{"rendered":"What is the best way to clean the glass bulb of the pH electrode?"},"content":{"rendered":"<p>Generally, rinsing the electrode with distilled water after using should suffice. If the glass bulb looks dirty, you can rinse the electrode with warm water and a mild household dish washing detergent (not Alconox detergent).<\/p>\n<p>If the electrode and bottle appear to have mold growing in or on them, you can clean with bleach to remove the mold.<\/p>\n<p>1) Fill the storage bottle with a mixture of 1 part chlorine bleach to 3 or 4 parts water (careful! such a mixture is hazardous to your skin and eyes!) and soak the electrode for 8 minutes.<br \/>\n2) Thoroughly rinse both in cold or lukewarm water.<br \/>\n3) Refill the bottle with pH Storage Solution and return the sensor to the bottle.<\/p>\n<p>In biological labs where proteins are used, the glass bulb can get fairly dirty. In this case, do the following:<\/p>\n<p>1) Soak the electrode for 10-15 minutes in an acidic pepsin mixture. Approximately 5% pepsin in a 0.001 M HCl solution should work (pepsin can be purchased through Flinn Scientific, order code P0006).<br \/>\n2) Thoroughly rinse the both in warm tap water.<br \/>\n3) Refill the bottle with pH Storage Solution and return the sensor to the bottle.<\/p>\n<p>Related:<br \/>\n<a href=\"\/til\/369\/\">Where do I get pH or ORP Storage Solution? (Buffer Storage Solution)<\/a><br \/>\n<a href=\"\/til\/2338\/\">What do I do about mold growth in my bottle of pH electrode storage solution?<\/a><br \/>\n<a href=\"\/til\/3032\/\">My pH Sensor has mold inside the shaft. How do I remove it?<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Generally, rinsing the electrode with distilled water after using should suffice. If the glass bulb looks dirty, you can rinse the electrode with warm water&#8230;<\/p>\n","protected":false},"author":11015,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[297,626,627,625,292,294,214],"class_list":["post-706","post","type-post","status-publish","format-standard","hentry","tag-7120b","tag-glass-bulb","tag-mold","tag-ph","tag-ph-electrode","tag-ph-bta","tag-ph-din"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/11015"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=706"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/706\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}