{"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\/vi\/applications\/determination-of-lead-in-sodium-pyrophosphate-food-additive","title":{"rendered":"X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng ch\u00ec trong ph\u1ee5 gia th\u1ef1c ph\u1ea9m natri pyrophosphat"},"content":{"rendered":"

1 T\u1ed5ng quan ph\u01b0\u01a1ng ph\u00e1p<\/b><\/strong><\/h2>\n

Sau khi x\u1eed l\u00fd m\u1eabu s\u01a1 b\u1ed9, c\u00e1c ion ch\u00ec t\u1ea1o th\u00e0nh ph\u1ee9c ch\u1ea5t v\u1edbi natri diethyldithiocarbamate (DDTC) d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n pH c\u1ee5 th\u1ec3. Ph\u1ee9c ch\u1ea5t n\u00e0y \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t v\u00e0 t\u00e1ch b\u1eb1ng 4-methyl-2-pentanone (MIBK), sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o m\u00e1y quang ph\u1ed5 h\u1ea5p th\u1ee5 nguy\u00ean t\u1eed \u0111\u1ec3 nguy\u00ean t\u1eed h\u00f3a b\u1eb1ng ng\u1ecdn l\u1eeda. \u0110\u1ed9 h\u1ea5p th\u1ee5 \u0111\u01b0\u1ee3c \u0111o \u1edf b\u01b0\u1edbc s\u00f3ng 283,3 nm. Trong m\u1ed9t ph\u1ea1m vi n\u1ed3ng \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, \u0111\u1ed9 h\u1ea5p th\u1ee5 c\u1ee7a ch\u00ec t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi h\u00e0m l\u01b0\u1ee3ng kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3, v\u00e0 vi\u1ec7c \u0111\u1ecbnh l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch so s\u00e1nh v\u1edbi d\u00e3y chu\u1ea9n.<\/p>\n

2. Ph\u1ea1m vi \u00e1p d\u1ee5ng<\/b><\/strong><\/h2>\n

Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng ch\u00ec trong ph\u1ee5 gia th\u1ef1c ph\u1ea9m natri pyrophosphat.<\/p>\n

3 Ti\u00eau chu\u1ea9n tham chi\u1ebfu<\/b><\/strong><\/h2>\n

Ti\u00eau chu\u1ea9n an to\u00e0n th\u1ef1c ph\u1ea9m qu\u1ed1c gia GB 25557-2010 \u2013 Ph\u1ee5 gia th\u1ef1c ph\u1ea9m Natri Pyrophosphat, M\u1ee5c A.10 X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng ch\u00ec<\/p>\n

4. D\u1ee5ng c\u1ee5, thi\u1ebft b\u1ecb v\u00e0 h\u00f3a ch\u1ea5t<\/b><\/strong><\/h2>\n

4.1 D\u1ee5ng c\u1ee5 v\u00e0 thi\u1ebft b\u1ecb<\/b><\/strong><\/h3>\n

4.1.1 D\u1ee5ng c\u1ee5 ph\u00e2n t\u00edch<\/b><\/strong><\/h4>\n

t\u1edd gi\u1ea5y<\/p>\n\n\n\n\n\n\n
Kh\u00f4ng.<\/b><\/strong><\/td>\nT\u00ean<\/b><\/strong><\/td>\nS\u1ed1 l\u01b0\u1ee3ng<\/b><\/strong><\/td>\nY\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/b><\/strong><\/td>\nPh\u1ee5 ki\u1ec7n<\/b><\/strong><\/td>\n<\/tr>\n
1<\/td>\nM\u00e1y quang ph\u1ed5 h\u1ea5p th\u1ee5 nguy\u00ean t\u1eed ng\u1ecdn l\u1eeda<\/td>\n1 b\u1ed9<\/td>\n\u2014<\/td>\n\u0110\u00e8n cathode r\u1ed7ng ch\u00ec<\/td>\n<\/tr>\n
2<\/td>\nM\u00e1y n\u00e9n kh\u00ed<\/td>\n1 \u0111\u01a1n v\u1ecb<\/td>\n\u00c1p su\u1ea5t kh\u00ed th\u1ea3i \u0111\u1ecbnh m\u1ee9c: 0,3 MPa<\/td>\n\u2014<\/td>\n<\/tr>\n
3<\/td>\nB\u00ecnh kh\u00ed axetylen<\/td>\n1 xi lanh<\/td>\n\u0110\u1ed9 tinh khi\u1ebft \u2265 99,99%<\/td>\n\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"

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 […]<\/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\/vi\/wp-json\/wp\/v2\/posts\/4882","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=4882"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4882\/revisions"}],"predecessor-version":[{"id":4883,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4882\/revisions\/4883"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media\/4824"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media?parent=4882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/categories?post=4882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/tags?post=4882"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}