| 塞曼石墨炉原子吸收测定蔬菜、水果及制品中铬和钴 |
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| 引用本文： | 刘素云,战新华.塞曼石墨炉原子吸收测定蔬菜、水果及制品中铬和钴[J].农业环境与发展,1996,13(1):8-12. |
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| 作者姓名： | 刘素云 战新华 |
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| 作者单位： | 天津农业部环境监测总站 |
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| 摘 要： | 本文介绍了用塞曼石墨炉原子吸收测定蔬菜、水果及其制品中Ｃｒ和Ｃｏ的方法。样品经高温灰化，以磷酸二氢铵作基体改良剂，用平台热解涂层石墨管进行样品测定。经１１组白菜参考样测定验证，铬和钴的相对偏差分别为８．４％和９．０％；两组不同浓度的铬和钴的加标回收率分别９３－１０１％和９４－１０５％。铬和钴的检出限分别为０．４１μｇ／１和０．３９μｇ／ｌ。本法也适用于其它生物样品中Ｃｒ和Ｃｏ的测定。
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| 关 键 词： | 铬，钴，蔬菜，水果，石墨炉原子吸收 |
Determination of Chromium and Cobalt in Vegetables,Fruits and their Processed Products by Zeeman Graphite Furnace Atomic Absorption Spectrophotometry |
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| Abstract: | Abstract A method for determining Cr and Co in Vegetables,fruits and their processed products by Zeeman graphite furnace,AAS is presented.The prepared samples are destructed by high-temperature ashing.Using (NH4)H2PO4 as matrix modifier, the sample solutions are directly determined by Z-8000 Zeeman AAS with pyrolytic coated graphite tube.The relative standard deviation of Cr and Co are respectively 8.4% and 9.0% in 11 times of detection of the refrence samples. The recovery of Cr and Co at two concentrations are respectively 93-101% and 94-105%.The detection limits for Cr and Co are respectively 0.41 μg/l and 0.39 μg/l.This method is also suitable for detection of Cr and Co in the other organical materials. |
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