{"id":4882,"date":"2026-08-13T13:56:27","date_gmt":"2026-08-13T05:56:27","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=4882"},"modified":"2026-08-13T13:56:27","modified_gmt":"2026-08-13T05:56:27","slug":"determination-of-lead-in-sodium-pyrophosphate-food-additive","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/id\/applications\/determination-of-lead-in-sodium-pyrophosphate-food-additive","title":{"rendered":"Penentuan Kadar Timbal dalam Aditif Makanan Natrium Pirofosfat"},"content":{"rendered":"<h2><strong><b>1 Gambaran Umum Metode<\/b><\/strong><\/h2>\n<p>Setelah perlakuan awal sampel, ion timbal membentuk kompleks dengan natrium dietilditiokarbamat (DDTC) pada kondisi pH tertentu. Kompleks tersebut diekstraksi dan dipisahkan menggunakan 4-metil-2-pentanon (MIBK), kemudian dimasukkan ke dalam spektrometer serapan atom untuk atomisasi nyala. Absorbansi diukur pada panjang gelombang 283,3 nm. Dalam rentang konsentrasi tertentu, absorbansi timbal berbanding lurus dengan kandungan massanya, dan kuantifikasi dilakukan dengan membandingkannya dengan serangkaian standar.<\/p>\n<h2><strong><b>2. Ruang Lingkup Penerapan<\/b><\/strong><\/h2>\n<p>Metode ini berlaku untuk penentuan kadar timbal dalam aditif makanan natrium pirofosfat.<\/p>\n<h2><strong><b>3 Standar Referensi<\/b><\/strong><\/h2>\n<p>GB 25557-2010 Standar Keamanan Pangan Nasional \u2013 Aditif Pangan Natrium Pirofosfat, Bagian A.10 Penentuan Timbal<\/p>\n<h2><strong><b>4 Instrumen, Peralatan, dan Reagen<\/b><\/strong><\/h2>\n<h3><strong><b>4.1 Instrumen dan Peralatan<\/b><\/strong><\/h3>\n<h4><strong><b>4.1.1 Instrumen Analitik<\/b><\/strong><\/h4>\n<p>lembaran<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong><b>Tidak, tidak.<\/b><\/strong><\/td>\n<td><strong><b>Nama<\/b><\/strong><\/td>\n<td><strong><b>Kuantitas<\/b><\/strong><\/td>\n<td><strong><b>Persyaratan Teknis<\/b><\/strong><\/td>\n<td><strong><b>Aksesoris<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>Spektrofotometer Penyerapan Atom Api<\/td>\n<td>1 set<\/td>\n<td>\u2014<\/td>\n<td>Timbal Hollow Cathode Lamp<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Kompresor Udara<\/td>\n<td>1 unit<\/td>\n<td>Tekanan knalpot nominal: 0,3 MPa<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Silinder Asetilena<\/td>\n<td>1 silinder<\/td>\n<td>Kemurnian \u2265 99,99%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>1 Method Overview After sample pretreatment, lead ions form a complex with sodium diethyldithiocarbamate (DDTC) under a specific pH condition. The complex is extracted and separated using 4-methyl-2-pentanone (MIBK), then introduced into an atomic absorption spectrometer for flame atomization. Absorbance is measured at a wavelength of 283.3 nm. Within a certain concentration range, the absorbance [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4824,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,77],"tags":[],"class_list":["post-4882","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications","category-bio-tech-and-life-sciences"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/posts\/4882","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/comments?post=4882"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/posts\/4882\/revisions"}],"predecessor-version":[{"id":4883,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/posts\/4882\/revisions\/4883"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/media\/4824"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/media?parent=4882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/categories?post=4882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/id\/wp-json\/wp\/v2\/tags?post=4882"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}