石墨炉原子吸收法测定食品中六价铬
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陈东 男 主管检验师 研究方向为食品中重金属检测E-mail:cd1_1@163.com

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北京市预防医学研究中心公益应用类课题(20130520)


Determination of hexavalent chromium in foods by GFAAS
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    摘要:

    建立食品中Cr(Ⅵ)的测定方法。方法 以10%的盐酸作为浸提液,样品通过微波120℃浸提15min,提取液经Waters MAX小柱(500mg,6cc)分离后用5%氨水淋洗,然后将淋洗液定容,经石墨炉原子吸收法间接测量Cr(Ⅵ)含量。结果 该方法在1~10μg/L的线性范围内具有良好的线性关系,r>0.999,方法检出限为0.0087mg/kg,回收率均在90.24%~108.06%之间,RSD为3.19%~6.01%。结论 该方法简便、快速、灵敏和准确,适合蔬菜、水果、谷物以及保健食品中Cr(Ⅵ)的检测。

    Abstract:

    A method was developed for the determination of hexavalent chromium in foods.MethodsSamples were microwave extracted with 10% hydrochloric acid for 15min at 120℃.Then extracts were separated with Waters MAX cartridge (500mg, 6cc) and eluted by 5% ammonia water. The hexavalent chromium was indirectly quantified by AAS. ResultsThe lineary range was satisfying within 1-10μg/L, and the correlation coefficients were above 0.999. The limit of detection was 0.0087mg/kg. The recoveries were 90.24%-108.06% with relative standard deviations of 3.19%-6.01%.ConclusionThe method was simple, fast, sensitive, accurate and suitable for the determination of hexavalent chromium in vegetables, fruits, grain and health foods.

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陈东,沙博郁,赵榕,吴国华.石墨炉原子吸收法测定食品中六价铬[J].中国食品卫生杂志,2014,26(2):150-152.

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  • 收稿日期:2013-12-27
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  • 在线发布日期: 2014-04-16
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