{"id":3891,"date":"2025-09-04T10:26:07","date_gmt":"2025-09-04T02:26:07","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=3891"},"modified":"2025-09-04T10:26:07","modified_gmt":"2025-09-04T02:26:07","slug":"determination-of-magnesium-in-sodium-bicarbonate-flame-atomic-absorption-spectrometry","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/vi\/applications\/determination-of-magnesium-in-sodium-bicarbonate-flame-atomic-absorption-spectrometry","title":{"rendered":"X\u00e1c \u0111\u1ecbnh magi\u00ea trong natri bicarbonat (quang ph\u1ed5 h\u1ea5p th\u1ee5 nguy\u00ean t\u1eed l\u1eeda)"},"content":{"rendered":"

1. T\u1ed5ng quan v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p<\/h2>\n
Sau khi m\u1eabu \u0111\u01b0\u1ee3c ti\u00eau h\u00f3a v\u00e0 nguy\u00ean t\u1eed h\u00f3a b\u1eb1ng ng\u1ecdn l\u1eeda, \u0111\u1ed9 h\u1ea5p th\u1ee5 \u0111\u01b0\u1ee3c \u0111o \u1edf b\u01b0\u1edbc s\u00f3ng 285,2 nm. Trong m\u1ed9t ph\u1ea1m vi n\u1ed3ng \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, gi\u00e1 tr\u1ecb h\u1ea5p th\u1ee5 c\u1ee7a magi\u00ea t\u01b0\u01a1ng \u1ee9ng v\u1edbi h\u00e0m l\u01b0\u1ee3ng c\u1ee7a n\u00f3, v\u00e0 \u0111\u1ecbnh l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch so s\u00e1nh v\u1edbi m\u1ed9t lo\u1ea1t ti\u00eau chu\u1ea9n.<\/div>\n
\n

2. D\u1ee5ng c\u1ee5 v\u00e0 thu\u1ed1c th\u1eed<\/h2>\n

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

2.1.1 D\u1ee5ng c\u1ee5 ki\u1ec3m tra<\/h4>\n
\n
\n\n\n\n\n\n\n\n
S\u1ed1 Serial<\/th>\nT\u00ean<\/th>\nS\u1ed1 l\u01b0\u1ee3ng<\/th>\nY\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/th>\nPh\u1ee5 ki\u1ec7n<\/th>\n<\/tr>\n<\/thead>\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\/<\/td>\n\u0110\u00e8n cathode r\u1ed7ng magi\u00ea<\/td>\n<\/tr>\n
2<\/td>\nKh\u00ed Acetylene<\/td>\n1 xi lanh<\/td>\n\u0110\u1ed9 tinh khi\u1ebft \u2265 99,99%<\/td>\n\/<\/td>\n<\/tr>\n
3<\/td>\nM\u00e1y n\u00e9n kh\u00ed<\/td>\n1 b\u1ed9<\/td>\n\u00c1p su\u1ea5t x\u1ea3 \u0111\u1ecbnh m\u1ee9c: 0,3 MPa<\/td>\n\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.1.2 Thi\u1ebft b\u1ecb x\u1eed l\u00fd tr\u01b0\u1edbc m\u1eabu<\/h4>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n
S\u1ed1 Serial<\/th>\nT\u00ean<\/th>\nS\u1ed1 l\u01b0\u1ee3ng<\/th>\nY\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/th>\nPh\u1ee5 ki\u1ec7n<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nH\u1ec7 th\u1ed1ng ti\u00eau h\u00f3a vi s\u00f3ng<\/td>\n1 b\u1ed9<\/td>\n\/<\/td>\n\/<\/td>\n<\/tr>\n
2<\/td>\nT\u1ea5m n\u00f3ng ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9<\/td>\n1 b\u1ed9<\/td>\n\/<\/td>\n\/<\/td>\n<\/tr>\n
3<\/td>\nC\u00e2n b\u1eb1ng \u0111i\u1ec7n t\u1eed<\/td>\n1 b\u1ed9<\/td>\n\u0110\u1ed9 nh\u1ea1y c\u1ea3m: 0,1 mg<\/td>\n\/<\/td>\n<\/tr>\n
4<\/td>\nH\u1ec7 th\u1ed1ng n\u01b0\u1edbc si\u00eau tinh khi\u1ebft<\/td>\n1 b\u1ed9<\/td>\n\/<\/td>\n\/<\/td>\n<\/tr>\n
5<\/td>\nMicropipette<\/td>\n1 m\u1ed7i<\/td>\nPh\u1ea1m vi: 20 \u03bcL ~ 200 \u03bcL, 100 \u03bcL ~ 1000 \u03bcL<\/td>\n\/<\/td>\n<\/tr>\n
6<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng Flask<\/td>\nM\u1ed9t s\u1ed1<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng: 100 ml<\/td>\n\/<\/td>\n<\/tr>\n
7<\/td>\n\u1ed1ng \u0111o m\u00e0u<\/td>\nM\u1ed9t s\u1ed1<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng: 25 ml<\/td>\n\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2.2 Ph\u1ea3n \u1ee9ng<\/h3>\n

2.2.1 Ph\u1ea3n \u1ee9ng th\u00f4<\/h4>\n
\n
\n\n\n\n\n\n\n
S\u1ed1 Serial<\/th>\nT\u00ean<\/th>\nY\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/th>\nNh\u1eadn x\u00e9t<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\naxit nitric<\/td>\nL\u1edbp MOS<\/td>\n\/<\/td>\n<\/tr>\n
2<\/td>\nAxit clorhydric<\/td>\nThu\u1ed1c th\u1eed \u0111\u1ea3m b\u1ea3o (GR)<\/td>\n\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.2 Ph\u1ea3n \u1ee9ng chu\u1ea9n b\u1ecb<\/h4>\n
\n
\n\n\n\n\n\n
S\u1ed1 Serial<\/th>\nT\u00ean<\/th>\nPh\u01b0\u01a1ng ph\u00e1p chu\u1ea9n b\u1ecb<\/th>\nNh\u1eadn x\u00e9t<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nGi\u1ea3i ph\u00e1p axit nitric (5 95)<\/td>\n\u0110o 50 ml axit nitric, t\u1eeb t\u1eeb th\u00eam v\u00e0o 950 ml n\u01b0\u1edbc deionized, v\u00e0 tr\u1ed9n t\u1ed1t.<\/td>\n\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.3 Ti\u00eau chu\u1ea9n tham kh\u1ea3o<\/h3>\n

2.3.1 Gi\u1ea3i ph\u00e1p ch\u1ee9ng kho\u00e1n<\/h4>\n
\n
\n\n\n\n\n\n
S\u1ed1 Serial<\/th>\nKh\u00f4ng.<\/th>\nT\u00ean<\/th>\nY\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/th>\nNh\u1eadn x\u00e9t<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nGBW (E) 080126<\/td>\nGi\u1ea3i ph\u00e1p ti\u00eau chu\u1ea9n nguy\u00ean t\u1ed1 \u0111\u01a1n magi\u00ea<\/td>\nN\u1ed3ng \u0111\u1ed9: 1000 \u03bcg \/ ml<\/td>\nVi\u1ec7n \u0111o l\u01b0\u1eddng qu\u1ed1c gia, Trung Qu\u1ed1c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

3. Quy tr\u00ecnh v\u1eadn h\u00e0nh<\/h2>\n

3.1 Chu\u1ea9n b\u1ecb m\u1eabu<\/h3>\n

3.1.1 Chu\u1ea9n b\u1ecb gi\u1ea3i ph\u00e1p th\u1eed nghi\u1ec7m<\/h4>\n
Tr\u1ecdng l\u01b0\u1ee3ng ch\u00ednh x\u00e1c 0,5 g m\u1eabu natri bicarbonate (ch\u00ednh x\u00e1c \u0111\u1ebfn 0,001 g) v\u00e0o m\u1ed9t t\u00e0u ti\u00eau h\u00f3a l\u00f2 vi s\u00f3ng, th\u00eam 8 ml axit nitric v\u00e0 ti\u00eau h\u00f3a m\u1eabu theo c\u00e1c th\u1ee7 t\u1ee5c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng ti\u00eau h\u00f3a l\u00f2 vi s\u00f3ng. Sau khi l\u00e0m m\u00e1t, l\u1ea5y t\u00e0u ti\u00eau h\u00f3a ra v\u00e0 bay h\u01a1i axit tr\u00ean m\u1ed9t t\u1ea5m n\u00f3ng \u1edf 140 \u2103 ~ 160 \u2103 cho \u0111\u1ebfn khi kh\u1ed1i l\u01b0\u1ee3ng gi\u1ea3m xu\u1ed1ng c\u00f2n 0,5 mL ~ 1 mL. Sau khi t\u00e0u ti\u00eau h\u00f3a l\u00e0m m\u00e1t, chuy\u1ec3n dung d\u1ecbch ti\u00eau h\u00f3a sang \u1ed1ng \u0111o m\u00e0u 25 mL. R\u1eeda m\u1ea1ch ti\u00eau h\u00f3a v\u1edbi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf n\u01b0\u1edbc trong 2 ~ 3 l\u1ea7n, k\u1ebft h\u1ee3p c\u00e1c dung d\u1ecbch r\u1eeda v\u00e0o \u1ed1ng \u0111o m\u00e0u, pha lo\u00e3ng \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u v\u1edbi n\u01b0\u1edbc, v\u00e0 tr\u1ed9n t\u1ed1t \u0111\u1ec3 s\u1eed d\u1ee5ng sau \u0111\u00f3. Chu\u1ea9n b\u1ecb m\u1ed9t thu\u1ed1c th\u1eed tr\u1ed1ng c\u00f9ng m\u1ed9t l\u00fac.<\/div>\n

 <\/p>\n

Ch\u01b0\u01a1ng tr\u00ecnh ti\u00eau h\u00f3a vi s\u00f3ng<\/strong><\/div>\n

 <\/p>\n

\n
\n\n\n\n\n\n\n\n\n\n
B\u01b0\u1edbc<\/th>\nNhi\u1ec7t \u0111\u1ed9 \/ \u2103<\/th>\nTh\u1eddi gian gi\u1eef \/ ph\u00fat<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n100<\/td>\n3<\/td>\n<\/tr>\n
2<\/td>\n120<\/td>\n3<\/td>\n<\/tr>\n
3<\/td>\n140<\/td>\n3<\/td>\n<\/tr>\n
4<\/td>\n160<\/td>\n3<\/td>\n<\/tr>\n
5<\/td>\n180<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

3.1.2 Chu\u1ea9n b\u1ecb c\u00e1c gi\u1ea3i ph\u00e1p ti\u00eau chu\u1ea9n<\/h4>\n
    \n
  1. \n
    Chu\u1ea9n b\u1ecb dung d\u1ecbch trung gian ti\u00eau chu\u1ea9n magi\u00ea (100 \u03bcg \/ mL): \u0110\u00f3ng ch\u00ednh x\u00e1c 10,0 mL dung d\u1ecbch c\u1ed5 phi\u1ebfu ti\u00eau chu\u1ea9n magi\u00ea (1000 \u03bcg \/ mL) v\u00e0o m\u1ed9t b\u00ecnh kh\u1ed1i l\u01b0\u1ee3ng 100 mL, pha lo\u00e3ng \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u v\u1edbi dung d\u1ecbch axit nitric (5 95) v\u00e0 l\u1eafc t\u1ed1t.<\/div>\n<\/li>\n
  2. \n
    Chu\u1ea9n b\u1ecb D\u00f2ng ti\u00eau chu\u1ea9n magi\u00ea: Ch\u00ednh x\u00e1c pipet 0,0, 0,1, 0,2, 0,3 v\u00e0 0,4 mL dung d\u1ecbch trung gian ti\u00eau chu\u1ea9n magi\u00ea (100 \u03bcg \/ mL) v\u00e0o c\u00e1c b\u00ecnh kh\u1ed1i l\u01b0\u1ee3ng 100 mL ri\u00eang bi\u1ec7t t\u01b0\u01a1ng \u1ee9ng. Pha lo\u00e3ng \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u v\u1edbi dung d\u1ecbch axit nitric (5 95) v\u00e0 tr\u1ed9n t\u1ed1t. N\u1ed3ng \u0111\u1ed9 c\u1ee7a lo\u1ea1t ti\u00eau chu\u1ea9n n\u00e0y l\u00e0 0,0, 0,1, 0,2, 0,3 v\u00e0 0,4 \u03bcg \/ mL.<\/div>\n<\/li>\n<\/ol>\n

    3.2 Ki\u1ec3m tra m\u1eabu<\/h3>\n
      \n
    1. \n
      \u0110i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m \u0110i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m tham chi\u1ebfu cho quang ph\u1ed5 h\u1ea5p th\u1ee5 nguy\u00ean t\u1eed ng\u1ecdn l\u1eeda: Th\u00f4ng s\u1ed1 Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt (magi\u00ea) | | — | — | | B\u01b0\u1edbc s\u00f3ng (nm) | 285.2 | | B\u0103ng th\u00f4ng quang ph\u1ed5 (nm) | 0.2 | | D\u00f2ng \u0111i\u1ec7n \u0111\u00e8n nguy\u00ean t\u1ed1 (mA) | 3.0 | | Chi\u1ec1u cao \u0111\u1ed1t (mm) | 6 | | T\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y kh\u00ed nhi\u00ean li\u1ec7u (mL \/ ph\u00fat) | 1500 | | \u00c1p su\u1ea5t m\u00e1y n\u00e9n kh\u00ed (MPa) | 0.22 | | Ph\u01b0\u01a1ng ph\u00e1p s\u1eeda ch\u1eefa n\u1ec1n | Kh\u00f4ng c\u00f3 |<\/div>\n<\/li>\n
    2. \n
      Ki\u1ec3m tra m\u1eabu \u0110i\u1ec1u ch\u1ec9nh thi\u1ebft b\u1ecb theo tr\u1ea1ng th\u00e1i l\u00e0m vi\u1ec7c t\u1ed1i \u01b0u c\u1ee7a n\u00f3, \u0111\u1ed1t ch\u00e1y v\u00e0 \u0111i\u1ec1u ch\u1ec9nh t\u1ef7 l\u1ec7 d\u00f2ng ch\u1ea3y kh\u00ed nhi\u00ean li\u1ec7u. Ki\u1ec3m tra c\u00e1c gi\u1ea3i ph\u00e1p ti\u00eau chu\u1ea9n v\u00e0 gi\u1ea3i ph\u00e1p m\u1eabu theo th\u1ee9 t\u1ef1, \u0111\u1ecdc d\u1eef li\u1ec7u, nh\u1eadp tr\u1ecdng l\u01b0\u1ee3ng m\u1eabu v\u00e0 ki\u1ec3m tra v\u00e0 ghi l\u1ea1i k\u1ebft qu\u1ea3.<\/div>\n<\/li>\n<\/ol>\n

      3.3 T\u00ednh to\u00e1n k\u1ebft qu\u1ea3<\/h3>\n
      H\u00e0m l\u01b0\u1ee3ng magi\u00ea trong m\u1eabu \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c sau:<\/div>\n<\/div>\n<\/div>\n<\/div>\n
      <\/div>\n
      \"\"<\/div>\n
      <\/div>\n
      \n
      \n
      \n
      \u1ede \u0111\u00e2u:<\/div>\n
        \n
      • X<\/span>\u00a0= H\u00e0m l\u01b0\u1ee3ng magi\u00ea trong m\u1eabu, \u0111\u01a1n v\u1ecb: miligram m\u1ed7i kilogram (mg \/ kg);<\/li>\n
      • \u03c1<\/span>\u00a0= N\u1ed3ng \u0111\u1ed9 kh\u1ed1i l\u01b0\u1ee3ng magi\u00ea trong dung d\u1ecbch th\u1eed nghi\u1ec7m m\u1eabu, \u0111\u01a1n v\u1ecb: miligram m\u1ed7i l\u00edt (mg \/ L);<\/li>\n
      • \u03c10<\/span>\u00a0= N\u1ed3ng \u0111\u1ed9 kh\u1ed1i l\u01b0\u1ee3ng magi\u00ea trong dung d\u1ecbch tr\u1ed1ng, \u0111\u01a1n v\u1ecb: miligram m\u1ed7i l\u00edt (mg \/ L);<\/li>\n
      • f<\/span>\u00a0= Y\u1ebfu t\u1ed1 pha lo\u00e3ng c\u1ee7a dung d\u1ecbch m\u1eabu ti\u00eau h\u00f3a;<\/li>\n
      • V<\/span>\u00a0= T\u1ed5ng kh\u1ed1i l\u01b0\u1ee3ng dung d\u1ecbch m\u1eabu ti\u00eau h\u00f3a, \u0111\u01a1n v\u1ecb: milil\u00edt (mL);<\/li>\n
      • m<\/span>\u00a0Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1eabu, \u0111\u01a1n v\u1ecb: gram (g).<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

        1. Method Overview After the sample is digested and atomized by flame, the absorbance is measured at a wavelength of 285.2 nm. Within a certain concentration range, the absorbance value of magnesium is proportional to its content, and quantification is performed by comparison with a standard series. 2. Instruments and Reagents 2.1 Instruments and Equipment […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[81,36],"tags":[],"class_list":["post-3891","post","type-post","status-publish","format-standard","hentry","category-petrochemical-and-chemical","category-applications"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/3891","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=3891"}],"version-history":[{"count":0,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/3891\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media?parent=3891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/categories?post=3891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/tags?post=3891"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}