| 可食印刷油墨~[1]中微量铅的测定 |
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| 引用本文： | 陈永华,解文秀.可食印刷油墨~[1]中微量铅的测定[J].济南大学学报(社会科学版),1995(3). |
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| 作者姓名： | 陈永华 解文秀 |
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| 作者单位： | 济南大学化学系
(陈永华)，济南大学化学系(解文秀) |
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| 摘 要： | 本文对可食印刷红色油墨的消解过程,测定方法及分析条件进行了系统研究.实验用HNO_3—HClO_4混合酸消解此样品效果最好。在消化液中加入盐酸羟胺和柠檬酸铵后用NH_3·H_2O调PH值为8.5—9.0之间,用双硫腙—CHCl_3溶液萃取铅,双硫腙在氯仿溶液中与Pb~(2+)离子生成红色螯合物,用721型分光光度计测双硫腙—Pb的吸光度,计算Pb~(2+)的含量。
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| 关 键 词： | 双硫腙 萃取分离 样品消解 微量铅分析 |
THE EXTRACTIVE ABSORPTION SPECTROSCOPICANALYSIS OF TRACE LEAD INPAINTING INK FOR FOODSTUFF |
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| Chen Yonghua,Xie Wenxiu.THE EXTRACTIVE ABSORPTION SPECTROSCOPICANALYSIS OF TRACE LEAD INPAINTING INK FOR FOODSTUFF[J].Journal of Jinan University,1995(3). |
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| Authors: | Chen Yonghua Xie Wenxiu |
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| Institution: | Chemical Department |
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| Abstract: | In this paper, we study the nitrating and analytic conditions of red ink. The best result will be obtained when HNO3:HCLO4=4:1 is present in the solution.Citric amide and KCN are added to the solution to prevent the precipitate of hydroxide and preclude the unnecessary ions before the value of PH is adjusted to 8. 5-9. 0 with NH3 ?H2O. then trace lead is extracted with CHCL3, and reacts with H2Dz to form red complex be-ing determined by 721 spectrum meter. |
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| Keywords: | H_2D_z Extractive Seperation Nitration Analysis of trace lead |
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