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(if) 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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