摘要
采用氢化物-原子荧光法测定茶叶中的痕量铋、镉,试验了酸介质和还原剂用量对测定测定的影响,考虑了金属离子的干扰。在最佳测定条件下,检出限分别为Bi:0.0946μg/L、Cd:0.0280μg/L线性范围分别为Bi:0.1～200μg/L、Cd:0.1～100μg/L,平均加标回收率在91.0%～104.2%之间。结果表明本法具有快速、简便、准确等特点。
A method was reported for the determination of trace bismuth and cadmium in the tea by hydride generation atomicfluorescence spectrometry. The effects of acid medium and reducing agent on the determination of Bi and Cd and coexisting elementswere studied. In the given conditions, the detection limits were Bi:0.0946μg/L and Cd:0.0280μg/L respectively. The linear rangesof determination were Bi:0.1～200μg/L and Cd: 0.1～100μg/L respectively. The average recovery was in the range of 96.1%～108.6%. The method was accurate, rapid and convenient with satisfactory results.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2005年第7期163-165,共3页
Food Science
基金
河南省科技攻关项目(O324420044)
关键词
断续流动
氢化物发生
原子荧光法
茶叶
铋
镉
intermittent flow
hydride generation
atomic fluorescence spectrometry
tea
bismuth
cadmium
