{"id":4477,"date":"2026-03-16T10:24:39","date_gmt":"2026-03-16T02:24:39","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=4477"},"modified":"2026-03-16T10:24:39","modified_gmt":"2026-03-16T02:24:39","slug":"determination-method-for-ammonia-nitrogen-in-surface-water-salicylate-spectrophotometric-method-2","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/vi\/applications\/environment\/determination-method-for-ammonia-nitrogen-in-surface-water-salicylate-spectrophotometric-method-2","title":{"rendered":"Ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh nit\u01a1 amoniac trong n\u01b0\u1edbc m\u1eb7t (ph\u01b0\u01a1ng ph\u00e1p \u0111o quang ph\u1ed5 salicylate)"},"content":{"rendered":"<p>1. Nguy\u00ean t\u1eafc ph\u01b0\u01a1ng ph\u00e1p<\/p>\n<p>Trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m (pH = 11,7) v\u1edbi s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a natri nitroferricyanide, amoniac v\u00e0 ammonium trong n\u01b0\u1edbc ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c ion salicylate v\u00e0 hypochlorite \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t h\u1ee3p ch\u1ea5t m\u00e0u xanh.<\/p>\n<p>2. Ph\u1ea1m vi \u1ee9ng d\u1ee5ng<\/p>\n<p>Y\u00eau c\u1ea7u v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch nit\u01a1 amoniac trong ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc<\/p>\n<p>3. C\u00e1c t\u00e0i li\u1ec7u tham kh\u1ea3o<\/p>\n<p>HJ 536-2009 Ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc - X\u00e1c \u0111\u1ecbnh nit\u01a1 amoniac<\/p>","protected":false},"excerpt":{"rendered":"<p>1. Method Principle In an alkaline medium (pH = 11.7) in the presence of sodium nitroferricyanide, ammonia and ammonium ions in water react with salicylate and hypochlorite ions to form a blue compound. The absorbance of this compound is measured at 697 nm to quantify the ammonia nitrogen content. 2. Scope of Application Requirements of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[75],"tags":[],"class_list":["post-4477","post","type-post","status-publish","format-standard","hentry","category-environment"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/comments?post=4477"}],"version-history":[{"count":0,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4477\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media?parent=4477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/categories?post=4477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/tags?post=4477"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}