文献类型：期刊文献

中文题名：不同前处理方法测定植物油中重金属的研究

英文题名：Determination of heavy metals content in vegetable oils with different preprocessing methods

作者：倪张林[1] 汤富彬[1] 屈明华[1]

第一作者：倪张林

机构：[1]中国林业科学研究院亚热带林业研究所,国家林业局经济林产品质量检验检测中心(杭州)

年份：2012

卷号：37

期号：7

起止页码：85-87

中文期刊名：中国油脂

外文期刊名：China Oils and Fats

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：中央级公益性科研院所基本科研业务费专项资金(RISF6151)

语种：中文

中文关键词：植物油;前处理方法;重金属;石墨炉原子吸收光谱法

外文关键词：vegetable oil; preprocessing methods; heavy metal ; GFAAS

分类号：TS225;TS201.6

摘要：考察了湿法消解、干法灰化、微波消解3种不同前处理方法对植物油中重金属含量测定结果的影响。结果表明,硝酸-过氧化氢-高氯酸湿法消解为植物油前处理的最佳方法。采用石墨炉原子吸收光谱法测定植物油中的铅、镉、铬,线性范围内相关性良好,相关系数大于0.99,加标回收率分别为88.2%、94.5%、84.9%,RSD分别为8.5%、5.3%、9.1%,检出限分别为6.21、0.89、1.99μg/kg。该方法耗时短、操作简单,应用于植物油中重金属含量的测定,结果令人满意。
Effects of three preprocessing methods,including wet digestion, ashing digestion and microwave digestion on the determination of heavy metals in vegetable oil were studied. After comparison, wet digestion method with HNO3 -H2 02 -HC104 was the best, and graphite aurnace atomic absorption spectrometry（GFAAS）was used to determine lead,cadmium and chromium in vegetable oil. This method had a good linear relation（r 〉0.99）. The recovery rate of lead,cadmium and chromium were 88.2% ,94.5% and 84.9% , respectively, the relative standard deviation were 8.5% ,5.3% and 9.1%, respectively, and the detection limits were 6.21,0.89 and 1.99μg/kg,respectively.