| 流动注射-氢化物发生-原子荧光法测定食品添加剂中的铅 |
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| 引用本文： | 张锂,韩国才. 流动注射-氢化物发生-原子荧光法测定食品添加剂中的铅[J]. 食品与发酵工业, 2005, 31(8): 97-99 |
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| 作者姓名： | 张锂 韩国才 |
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| 作者单位： | 1. 兰州工业高等专科学校基础学科部,兰州,730050;西北师范大学化学化工学院,兰州,730070
2. 兰州工业高等专科学校基础学科部,兰州,730050 |
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| 摘 要： | 建立了流动注射-氢化物发生-原子荧光光谱法测定食品添加剂中铅的方法。样品经硝酸高压消解后,加干扰抑制剂(100g/L硫氰酸钾-100g/L草酸)选用以重铬酸钾-铁氰化钾为氧化剂与HCl作介质的分析溶液混合进行氧化反应发生铅烷,然后用氢化物发生-原子荧光光谱法测定铅,并对各种分析条件进行了优化和探讨。方法线性范围为0～80μg/L,检出限为0.35μg/L,相对标准偏差(RSD)<2.7%。应用于实际样品的检测,加标回收率在98.0%～103.0%,精密度1.8%～3.6%取得满意的结果。
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| 关 键 词： | 流动注射 氢化物发生原子荧光法 食品添加剂 铅 |
| 收稿时间： | 2005-03-31 |
| 修稿时间： | 2005-07-07 |
Determination of the Lead in Food Additive by Flow Injection Hydride Generation-Atomic Fluorescence Spectrometry |
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| Zhang Li,Han Guocai. Determination of the Lead in Food Additive by Flow Injection Hydride Generation-Atomic Fluorescence Spectrometry[J]. Food and Fermentation Industries, 2005, 31(8): 97-99 |
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| Authors: | Zhang Li Han Guocai |
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| Affiliation: | Zhang Li 1,2 Han Guocai1 1 |
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| Abstract: | Determination lead in food additive by Flow Injection Hydride Generation-Atomic Fluorescence Spectrometry was proposed. The sample was digested under pressure with nitric acid, lead hydride was generated from the merging of an acidified sample solution with oxidative catalyst containing potassium dirchromate and potassium farricyanide. The detection limits is 0.35μg/L in the linear range of 0～80μg/L with relative standard deviations of less than 2.7%. The recovery was between 98%～103% when applied in the actual sample analysis. |
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| Keywords: | flow injection hydride generation-atomic fluorescence spectrometry food additive lead |
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