{"id":1599,"date":"2015-12-08T22:14:04","date_gmt":"2015-12-09T06:14:04","guid":{"rendered":""},"modified":"2024-06-26T15:50:17","modified_gmt":"2024-06-26T22:50:17","slug":"1599","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/1599","title":{"rendered":"What type of liquids cause problems for the pH Sensor?"},"content":{"rendered":"<p>There are two issues here:<br \/>\n1) Solutions that are difficult to measure<br \/>\n2) Solutions that will damage the sensor<\/p>\n<p><b>Solutions that are Difficult to Measure<\/b><br \/>\nThe pH Sensor (<a href=\"https:\/\/www.vernier.com\/product\/go-direct-ph-sensor\/\">GDX-PH<\/a>, <a href=\"https:\/\/www.vernier.com\/product\/go-direct-tris-compatible-flat-ph\/\">GDX-FPH<\/a>, <a href=\"https:\/\/www.vernier.com\/product\/ph-sensor\/\">PH-BTA<\/a> or <a href=\"https:\/\/www.vernier.com\/product\/tris-compatible-flat-ph-sensor\/\">FPH-BTA<\/a>) will have difficulty measuring the pH of the following liquids: distilled water, water with a low ion concentration, food and wine, ocean water, brackish water, and wastewater. In these liquids, the pH readings will be slow to stabilize, potentially taking several minutes.<\/p>\n<p><b>Solutions that can Damage the Sensor<\/b><br \/>\nThe pH Sensor can be damaged if you try to measure the pH of an aqueous solution containing a protein or a Tris buffer. Long-term exposure to these species can cause irreparable damage to the sensor. Vernier sells the <a href=\"\/product\/go-direct-tris-compatible-flat-ph\/\">Go Direct<sup>&reg;<\/sup> Tris-Compatible Flat pH<\/a> (<nobr>GDX-FPH<\/nobr>) and <a href=\"\/product\/tris-compatible-flat-ph-sensor\/\">Tris-Compatible Flat pH Sensor<\/a> (<nobr>FPH-BTA<\/nobr>) which, because of its double-junction construction, can be used in these types of solutions.<\/p>\n<p>In addition, do not place the sensor in hydrofluoric acid or an acid or base solution with a concentration higher than 1 M.<\/p>\n<p>Keep in mind that all our pH sensors (<a href=\"https:\/\/www.vernier.com\/product\/go-direct-ph-sensor\/\">GDX-PH<\/a>, <a href=\"https:\/\/www.vernier.com\/product\/go-direct-tris-compatible-flat-ph\/\">GDX-FPH<\/a>, <a href=\"https:\/\/www.vernier.com\/product\/ph-sensor\/\">PH-BTA<\/a> or <a href=\"https:\/\/www.vernier.com\/product\/tris-compatible-flat-ph-sensor\/\">FPH-BTA<\/a>) are designed to be used in aqueous solutions. The polycarbonate body of the sensor can be damaged by many organic solvents, including but not restricted to: chloroform, acetone, methanol, toluene, xylene, and methyl ethyl ketone.<\/p>\n<p><b>Options for Specific Solvents<\/b><br \/>\nWe do offer Glass Body pH probes and electrodes (<a href=\"\/product\/go-direct-glass-body-ph-sensor\/\">Go Direct<sup>&reg;<\/sup> Glass-Body pH Sensor<\/a> (<nobr>GDX-GPH<\/nobr>) and <a href=\"\/product\/glass-body-ph-electrode-bnc\/\">Glass-Body pH Electrode BNC<\/a> (<nobr>GPH-BNC<\/nobr>)) that will work under all of these conditions. Please consider this electrode if you have specific solvent needs.<\/p>","protected":false},"excerpt":{"rendered":"<p>There are two issues here: 1) Solutions that are difficult to measure 2) Solutions that will damage the sensor Solutions that are Difficult to Measure&#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":[2295,2296,2297,625,294,214,2294],"class_list":["post-1599","post","type-post","status-publish","format-standard","hentry","tag-brackish-salt-salty-salt-water","tag-estuary-ocean-sea","tag-gph-bnc","tag-ph","tag-ph-bta","tag-ph-din","tag-tris"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1599","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=1599"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1599\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=1599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=1599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=1599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}