粮油食品科技

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ICP-MS测定饼干中的铅、砷、铬、镉、铜、锌、铁和锰
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Determination of Pb, As, Cr, Cd, Cu, Zn, Fe and Mn in biscuit by ICP-MS
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    摘要:

    探讨了应用电感耦合等离子体质谱仪测定饼干中铅、砷、铬、镉、铜、锌、铁和锰8种重金属元素的方法。运用微波消解系统对样品进行消解,以铋、锗、钪和铟作为内标物,用ICP-MS对消解液进行检测,并采用国标方法对其结果进行验证。利用加标回收率试验和国家标准物质小麦(GBW 10052)检测试验考察了方法的准确性和可靠性。结果表明,该方法所测元素在标准溶液浓度范围内呈线性关系,相关系数均大于0.999,方法检出限在0.002~0.500 mg/kg之间,相对标准偏差均小于655%,本法与国标方法测量结果的相对偏差在3.73%~8.40%之间,加标回收率在88.0%~106%之间,标准物质的测定值与标准参考值符合要求。

    Abstract:

    Determination method of Pb,As,Cr,Cd,Cu,Zn,Fe and Mn in biscuit by ICP-MS was researched.The sample was digested by the full automatic microwave, the digestion solution was determined by ICP-MS with Bi,Ge,Sc and In as internal standard, the determination results were validated with the national standard method. The accuracy and reliability of the method were verified by the recovery and analysis of the national standard substance wheat (GBW10052). It showed that all of the linearly dependent coefficients of the curves were more than 0.999, the detection limits varied from 0.002 mg/kg to 0.500 mg/kg, the relative standard deviations were lower than 6.55%, the relative deviations of two methods between 3.73%~8.40%, the recoveries were from 88.0% to 106% ,the results of determination in the national standard substance of GBW10052 were all within the ranges of standard values. The test results are satisfied.

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李浩洋,李蓉,林晓云,冯雪雅,李云松,邓建. ICP-MS测定饼干中的铅、砷、铬、镉、铜、锌、铁和锰[J].粮油食品科技,2016,24(2):65-68.

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  • 在线发布日期: 2016-04-25
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