{"id":5214,"date":"2026-09-10T16:44:35","date_gmt":"2026-09-10T08:44:35","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=5214"},"modified":"2026-09-10T16:44:35","modified_gmt":"2026-09-10T08:44:35","slug":"determination-of-potassium-oxide-in-alumina-powder-flame-atomic-absorption-spectrometry-2","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/pt\/applications\/determination-of-potassium-oxide-in-alumina-powder-flame-atomic-absorption-spectrometry-2","title":{"rendered":"Determina\u00e7\u00e3o do \u00f3xido de pot\u00e1ssio em p\u00f3 de alum\u00ednia"},"content":{"rendered":"<p>1 Resumo do M\u00e9todo<br \/>\nA amostra \u00e9 aquecida e dissolvida em um b\u00e9quer de quartzo com uma mistura de \u00e1cido sulf\u00farico e fosf\u00f3rico. Ap\u00f3s dilui\u00e7\u00e3o com \u00e1gua, a absorb\u00e2ncia do pot\u00e1ssio \u00e9 medida em um espectrofot\u00f4metro de absor\u00e7\u00e3o at\u00f4mica a um comprimento de onda de 766,5 nm, utilizando uma chama de ar-acetileno. Dentro de uma determinada faixa de concentra\u00e7\u00e3o, a absorb\u00e2ncia do pot\u00e1ssio \u00e9 proporcional ao seu teor, e a quantifica\u00e7\u00e3o \u00e9 realizada por compara\u00e7\u00e3o com uma s\u00e9rie de padr\u00f5es.<\/p>\n<p>2. \u00c2mbito de aplica\u00e7\u00e3o<br \/>\nEste m\u00e9todo \u00e9 aplic\u00e1vel \u00e0 determina\u00e7\u00e3o do teor de \u00f3xido de pot\u00e1ssio em p\u00f3 de alumina.<\/p>\n<p>3 Base de Refer\u00eancia<br \/>\nGB\/T 6609.6\u20112018, M\u00e9todos para an\u00e1lise qu\u00edmica e ensaio de propriedades f\u00edsicas da alumina \u2014 Parte 6: Determina\u00e7\u00e3o do teor de \u00f3xido de pot\u00e1ssio<\/p>\n<p>4 Instrumentos e Reagentes<\/p>\n<p>4.1 Instrumentos e equipamento<\/p>\n<p>4.1.1 Instrumentos de teste<\/p>\n<table>\n<thead>\n<tr>\n<th>N\u00e3o.<\/th>\n<th>Nome<\/th>\n<th>Quantidade<\/th>\n<th>Requisitos t\u00e9cnicos<\/th>\n<th>Acess\u00f3rios<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Espectrofot\u00f4metro de Absor\u00e7\u00e3o At\u00f4mica (TAS\u2011990)<\/td>\n<td>1 conjunto<\/td>\n<td>\u2014<\/td>\n<td>L\u00e2mpada de c\u00e1todo oco de pot\u00e1ssio<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Compressor de ar<\/td>\n<td>1 conjunto<\/td>\n<td>Press\u00e3o nominal de exaust\u00e3o: 0,3 MPa<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Acetileno<\/td>\n<td>1 cilindro<\/td>\n<td>Pureza \u226599,99%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>1 Method Overview The test portion is heated and dissolved in a quartz beaker with mixed sulfuric\u2011phosphoric acid. After dilution with water, the absorbance of potassium is measured at a wavelength of 766.5\u202fnm on an atomic absorption spectrophotometer using an air\u2011acetylene flame. Within a certain concentration range, the absorbance of potassium is proportional to its [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4907,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[81,36],"tags":[],"class_list":["post-5214","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-petrochemical-and-chemical","category-applications"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/5214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/comments?post=5214"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/5214\/revisions"}],"predecessor-version":[{"id":5215,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/5214\/revisions\/5215"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media\/4907"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media?parent=5214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/categories?post=5214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/tags?post=5214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}