作者：杨定清, 雷绍荣, 谢永红, 黄惠兰, 王棚

作者单位：四川农科院分析测试中心, 四川 成都 610066

关键词：原子荧光光谱法; 氢化物发生; 味精; 铅

摘要：

该文讨论了氢化物原子荧光法测定味精样品中的铅,结果表明,样品经水直接溶解后,在30gL-1硼氢化钾(KBH4)还原剂介质和5gL-1氢氧化钾溶液中,样品溶液酸度以0.24 molL-1为最佳。铅浓度在2~12gL-1范围内与荧光值呈线性,相关系数为r=0.9993。RSD小于10%,回收率为95%~102%。该法具有简便、准确、可靠、干扰少的优点。

Determination of lead in monosodium gultamate by HG-AFS

YANG Ding-qing, LEI Shao-rong, XIE Yong-hong, HUANG Hui-lan, WANG Peng

Testing Center of Sichuan Academy of Agricultural Sciences, Chengdu 610066, China

Abstract: This paper studied the determination of lead in Monosodium Gultamate by HG-AFS method.A solution of 30g of potassium borohydride(KBH₄) dissolved in 1000mL containing 5g·L^-1 KOH solution was used as reductant to generate lead hydride.The results showed that:the best concentration of HCl in sample solution was 0.24 mol·L^-1.Linear relationship between the fluorescence intensity(I_f) and lead concentration held in the range of 2~12μg·L^-1(r=0.9993).RSD obtained was less than 10%.Recoveries were in the range of 95%~102%.This method was proved to be not only good in accuracy and precision but also easy to manipalate and less in disturbance.

Keywords: AFS; Hydride generation; Monosodium Gultamate; Pb

2006, 32(3): 124-125  收稿日期: 2005-12-9;收到修改稿日期: 2006-2-25

基金项目: 

作者简介: 杨定清(1964-),女,四川彭州人,副研究员,主要从事食品中重金属分析技术研究。

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