| 不同前处理方法测定植物油中重金属的研究 |
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| 引用本文： | 倪张林,汤富彬,屈明华. 不同前处理方法测定植物油中重金属的研究[J]. 中国油脂, 2012, 37(7): 85-87 |
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| 作者姓名： | 倪张林 汤富彬 屈明华 |
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| 作者单位： | 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),浙江富阳311400 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金 |
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| 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。
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| 关 键 词： | 植物油 前处理方法 重金属 石墨炉原子吸收光谱法 |
Determination of heavy metals content in vegetable oils with different preprocessing methods |
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| NI Zhanglin , TANG Fubin , QU Minghua. Determination of heavy metals content in vegetable oils with different preprocessing methods[J]. China Oils and Fats, 2012, 37(7): 85-87 |
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| Authors: | NI Zhanglin TANG Fubin QU Minghua |
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| Affiliation: | (Quality Testing Center for None-wood Forest Products of State Forestry Administration(Hangzhou), Research Institute of Subtropical Forestry,CAF,Fuyang 311400,Zhejiang,China) |
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| Abstract: | 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-H2O2-HClO4 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 1.99 μg/kg,respectively. |
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| Keywords: | vegetable oil preprocessing methods heavy metal GFAAS |
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