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Determination of trace cobalt in porcine liver by polarography of microwave degradation derived from cobalt-dimethylglyoxime-sodium nitrite
Author(s): 
Pages: 115-117
Year: Issue:  1
Journal: FOOD AND MACHINERY

Keyword:  极谱催化波丁二酮肟亚硝酸钠;
Abstract: 目的:研究钴(Ⅱ)-丁二酮肟(H2D)络合极谱波的性质;方法:在pH为9的氨性环境中,0.2 moL/L亚硝酸钠存在下,钴(Ⅱ)与丁二酮肟(H2D)络合反应,在-1.30 V(VsSCE)处产生灵敏的极谱波,讨论该络合物的电极反应机理,建立测定痕量钴的方法;结果:钴(Ⅱ)在0.004~0.10μg/mL内符合线性范围,检出限(3σ)为1.2×10-3μg/mL,电活性络合物组成为钴(Ⅱ)∶(H2D)=1∶1;结论:该法可用于猪肝中痕量钴的测定,分析结果的相对标准偏差小于2.8%.回收率在97~103%,结果满意.
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