| 螯合萃取石墨炉原子吸收光谱法测定食品中的砷 |
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| 引用本文： | 刘立 魏玉芝. 螯合萃取石墨炉原子吸收光谱法测定食品中的砷[J]. 食品与发酵工业, 1998, 24(5): 9-13 |
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| 作者姓名： | 刘立 魏玉芝 |
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| 作者单位： | 中国食品发酵工业研究所 |
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| 摘 要： | 采用石墨炉原子吸收技术研究了食品中砷的测定方法。选择ＡＰＤＣ－ＭＩＢＫ萃取分离体系使砷与基体分离；采用硝酸镁＋硝酸镍作混合基体改进剂，将灰化温度提高到１１００℃，消除了共存阴、阳离子的干扰。方法检出限１．６ｎｇ／ｍｌ，２ｇ样品的最低检出浓度为６．０ｎｇ／ｇ，相对标准偏差小于１４％，平均加标回收率为９９．１±６．９％。本法具有干扰少，灵敏度高等特点。
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| 关 键 词： | 砷 石墨炉原子吸收法 基体改进剂 螯合萃取 |
Determination of Arsenic in Food by Chelate Extraction and Graphite Furnace Atomic Absorption Spectrometry |
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| Liu Li Wei Yuzhi Song Quanhou. Determination of Arsenic in Food by Chelate Extraction and Graphite Furnace Atomic Absorption Spectrometry[J]. Food and Fermentation Industries, 1998, 24(5): 9-13 |
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| Authors: | Liu Li Wei Yuzhi Song Quanhou |
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| Abstract: | A method for determination of As in food by graphite furnace atomic sbsorption spectrometry has been developed. Using APDC MIBK extraction system and Mg(NO 3) 2+Ni(NO 3) 2 as a matrix modifier, the chartemperature can be raised to 1 100℃. Possible interferences from cations and anions have been eliminated.The limit of detection is 1.6 ng/ml, the lowest detection concentration of 2 g sample is 6.0 ng/g , R.S.D. is <14% and the recovery is 99.1±6.9%. The suggested method have a high sensitivity and few interference. |
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| Keywords: | arsenic graphite furnace atomic absorption spectrometry matrix modifier chelate extraction |
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