{"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\/de\/applications\/determination-of-lead-in-sodium-pyrophosphate-food-additive","title":{"rendered":"Bestimmung des Bleigehalts im Lebensmittelzusatzstoff Natriumpyrophosphat"},"content":{"rendered":"<h2><strong><b>1 Methodenblick<\/b><\/strong><\/h2>\n<p>Nach der Probenvorbehandlung bilden Bleiionen unter spezifischen pH-Bedingungen einen Komplex mit Natriumdiethyldithiocarbamat (DDTC). Der Komplex wird mit 4-Methyl-2-pentanon (MIBK) extrahiert und abgetrennt und anschlie\u00dfend in ein Atomabsorptionsspektrometer zur Flammenatomisierung eingebracht. Die Absorption wird bei einer Wellenl\u00e4nge von 283,3 nm gemessen. Innerhalb eines bestimmten Konzentrationsbereichs ist die Absorption von Blei proportional zu seinem Massengehalt; die Quantifizierung erfolgt durch Vergleich mit einer Standardreihe.<\/p>\n<h2><strong><b>2 Anwendungsbereich<\/b><\/strong><\/h2>\n<p>Dieses Verfahren eignet sich zur Bestimmung des Bleigehalts im Lebensmittelzusatzstoff Natriumpyrophosphat.<\/p>\n<h2><strong><b>3 Referenzstandards<\/b><\/strong><\/h2>\n<p>GB 25557-2010 Nationaler Lebensmittelsicherheitsstandard \u2013 Lebensmittelzusatzstoff Natriumpyrophosphat, Abschnitt A.10 Bestimmung von Blei<\/p>\n<h2><strong><b>4 Instrumente, Ger\u00e4te und Reagenzien<\/b><\/strong><\/h2>\n<h3><strong><b>4.1 Instrumente und Ausr\u00fcstung<\/b><\/strong><\/h3>\n<h4><strong><b>4.1.1 Analytische Instrumente<\/b><\/strong><\/h4>\n<p>Blatt<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong><b>- Nein. - Nein.<\/b><\/strong><\/td>\n<td><strong><b>Name<\/b><\/strong><\/td>\n<td><strong><b>Menge<\/b><\/strong><\/td>\n<td><strong><b>Technische Anforderungen<\/b><\/strong><\/td>\n<td><strong><b>Zubeh\u00f6r<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>Flammenabsorptionsspektrophotometer<\/td>\n<td>1 Satz<\/td>\n<td>\u2014<\/td>\n<td>Blei Hohlkathodenlampe<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Luftkompressor<\/td>\n<td>1 Einheit<\/td>\n<td>Nenndruck: 0,3 MPa<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Acetylenzylinder<\/td>\n<td>1 Zylinder<\/td>\n<td>Reinheit \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\/de\/wp-json\/wp\/v2\/posts\/4882","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/comments?post=4882"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/posts\/4882\/revisions"}],"predecessor-version":[{"id":4883,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/posts\/4882\/revisions\/4883"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/media\/4824"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/media?parent=4882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/categories?post=4882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/de\/wp-json\/wp\/v2\/tags?post=4882"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}