同位素稀释质谱法测定人尿中微量镍、铜、铅

同位素稀释质谱法测定人尿中微量镍、铜、铅

摘要

摘要: 介绍了采用同位素稀释质谱法（ＩＤＭＳ）测定冻干人尿样品中镍、铜、铅的含量。用天然丰度的镍、铜、铅标准溶液标定浓缩同位素￣（６２）Ｎｉ、￣（６５）Ｃｕ、￣（２０７）ｐｂ溶液的浓度，再用此溶液作稀释剂，用ＩＤＭＳ法测定冻干人尿样品中的镍、铜、铅。实验结果表明：冻干人尿样品中镍、铜、铅的含量（质量分数ω）分别为（０．３０９±０．００４）×１０￣（－６）（０．４４２±０．０１３）×１０￣（－６）、（０．１００±０．００４）×１０￣（－６）。

Abstract: DETERMINATION OF Ni,Cu,Pb，CONCENTRATION IN THE FREEZE DRIED URINEZHAO MOTIAN ；WANG JUN（National Research for Certified Reference Mateial,Beijing 100013）ABSTRACT The method of determining Ni, Cu and Pbi n urine with isotope dilution mass spectrometry（IDMS）is described． First，the concentrations of the enriched isotope solutions of~(62)Ni，~(65)Cu and~(207)pb are determined with the standard solutions of Ni，Cu and Pb as spikes．Then，the contents ofNi、Cu and Pb in the freeze dried urine are determined by IDMS with the enriched isOtope solu-tions as spikes. The experimantal results show that the contents（ω）of Ni，Cu and Pb in thefreeze dried urine are（O．309 ± 0．004）× 100~(-6)，（0．442±0．013）× 10~（-6），（0．100±0．004） ×10~（-6），respectively. Key words Isotope dilution mass spectrometry Freeze dried urine Nickel Copper Lead

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