Determination of lead, cadmium and mercury in microwave-digested foodstuffs by RP-HPLC with an on-line enrichment technique

被引：11

作者：

Huang, ZJ ^{[1
]}

Yang, GY ^{[1
]}

Hu, QF ^{[1
]}

Yin, JY ^{[1
]}

机构：

[1] Yunnan Univ, Dept Chem, Kunming 650091, Peoples R China

来源：

ANALYTICAL SCIENCES | 2003年 / 19卷 / 02期

关键词：

D O I：

10.2116/analsci.19.255

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new method for the simultaneous determination of lead, cadmium and mercury ions in microwave-digested foodstuffs by reversed-phase high-performance liquid chromatography combined with on-line enrichment technique has been developed. The foodstuff samples were digested by microwave digestion. The lead, cadmium and mercury ions can be precolumn derivatized with 5,10,15,20-tetrakis(3-aminophenyl)porphine (T(3)APP) to form color chelates; then, the Hg-T(3)APP, Cd-T(3)APP and Pb-T(3)APP chelates can be enriched and separated on a valve switching HPLC system combined with on-line enrichment technique. The linearity ranges are 0.01 - 120 mug/l for each metal ion. The detection limits (S/N = 3) of lead, cadmium and mercury are 1.2 ng/l, 0.5 ng/l and 0.8 ng/l, respectively. This method was applied to the determination of lead, cadmium and mercury in foodstuffs with good results.

引用

页码：255 / 258

页数：4

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