炉内消解石墨炉原子吸收光谱法测定食品中铅
GF-AAS Determination of Lead in Food with Direct Sample Digestion in Graphite Furnace
摘 要
提出以水溶解或稀释作为食品中金属元素测定的样品前处理手段,建立了炉内直接消解石墨炉原子吸收光谱法快速测定食品中铅的方法.适用于能与水形成均匀溶液或乳浊液的样品,且能最大限度避免沾污.检出限为0.02 mg·kg-1,测定限为0.07 mg·kg-1,方法应用于20多种食品样品的测定,求得RSD(n=5)值在2.0%~7.8%之间,回收率在85.7%~105.3%之间.
铅
食品
消解
Graphite furnace atomic absorption spectroscopy
Pb
Food
Digestion
Abstract
A GFAAS method for the determination of Pb in food was proposed in this paper.The food sample was prepared by dissolution or dilution with water.The introduced sample was digested in the interior of graphite tube during ashing step.The method is suitable for those homogeneous water-soluble or emulsion samples and contamination can be avolded.Detection limit and determination limit of this method were found as 0.02 mg·kg-1 and 0.07 mg·kg-1 respectively.The proposed method has been applied to the determination of Pb in more than 20 samples with values of RSD′s (n=5) and recovery in the ranges of 2.0%-7.8% and 85.7%-105.3% respectively.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2006/3/13
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备注张秀尧(1962-),男,浙江省平阳县人,主任技师,研究方向为原子吸收光谱法、色谱法、流动注射分析法在卫生理化检验中的应用.
引用该论文: ZHANG Xiu-yao. GF-AAS Determination of Lead in Food with Direct Sample Digestion in Graphite Furnace[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(9): 766～768
张秀尧. 炉内消解石墨炉原子吸收光谱法测定食品中铅[J]. 理化检验－化学分册, 2007, 43(9): 766～768
被引情况:
【1】陶琳,许宏民,孙计赞,张苗,尹晓艳,项海波, "微波消解样品-石墨炉原子吸收光谱法测定食品添加剂中铅和镉含量",理化检验－化学分册 46, 428-429(2010)
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参考文献
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【2】孙汉文.原子吸收光谱分析技术[M].北京:中国科学技术出版社,1992:156．
【3】Richard D Beaty,Jack D Kerber.Concepts.Instrumentation and techniques in atomic absorption spectrophotometry[M].2nd ed.Norwalk CT USA:The Perkin-Elmer Corporation,1993:3-4．
【4】GB 10766-1997婴儿配方乳粉Ⅱ、Ⅲ[S]．
【5】GB11673-2003含乳饮料卫生标准[S]．
【2】孙汉文.原子吸收光谱分析技术[M].北京:中国科学技术出版社,1992:156．
【3】Richard D Beaty,Jack D Kerber.Concepts.Instrumentation and techniques in atomic absorption spectrophotometry[M].2nd ed.Norwalk CT USA:The Perkin-Elmer Corporation,1993:3-4．
【4】GB 10766-1997婴儿配方乳粉Ⅱ、Ⅲ[S]．
【5】GB11673-2003含乳饮料卫生标准[S]．
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