摘要
建立了超级微波消解-电感耦合等离子体质谱仪(ICP-MS)测定食用油中铅、砷、铜的方法。以5 m L硝酸、1 m L双氧水和0. 2 m L硫酸作为消解用酸体系,在消解程序升温温度依次为110、170、230℃下,采用超级微波消解法对食用油进行前处理,采用ICP-MS法测定食用油中的铅、砷、铜。结果表明:标准曲线在0～50 ng/m L铅、砷、铜质量浓度范围内线性关系良好,相关系数在0. 999 6～1. 000 0之间,相对标准偏差(RSD)为3. 2%～8. 3%,检出限为铅0. 5 ng/m L、砷0. 1ng/m L、铜0. 1 ng/m L,加标回收率均在82. 1%～101. 5%之间。该方法准确、快速、方便,适用于食用油中铅、砷、铜的测定。
A ultrawave digestion - inductively coupled plasma mass spectrometry （ ICP - MS） method for determination of lead, arsenic and copper in edible oil was established. Using 5 mL nitric acid, 1 mL hydrogen peroxide and 0.2 mL sulfuric acid as the digestion acid system, digestion programmed temperature 110,170,230 ℃ in turn,the ultrawave digestion method was used to pretreat the edible oil, then ICP- MS was used to determine the lead, arsenic and copper in the edible oil. The results showed that there were good linear relationships of the standard curves within the mass concentrations of lead, arsenic and copper 0 - 50 ng/mL. The correlation coefficient, relative standard deviation （RSD） and recoveries were 0.999 6 - 1. 000 0, 3.2% - 8.3% and 82.1% - 101.5%, respectively. The limits of detection were 0. 5 ng/mL for lead, 0.1 ng/mL for arsenic and 0.1 ng/mL for copper. The method had the items of accuracy, fastness and convenience, and was suitable for the determination of lead, arsenic and copper in edible oil.
作者
何兵兵
乔晴
王向军
李倩
HE Bingbing;QIAO Qing;WANG Xiangjun;LI Qian(Henan Entry-Exit Inspection ＆ Quarantine Bureau,Zhengzhou 450003,China)
出处
《中国油脂》
CAS
CSCD
北大核心
2018年第11期133-136,共4页
China Oils and Fats
基金
河南出入境检验检疫局科技计划项目(HAKJ201701)
作者简介
何兵兵（1989），男，助理工程师，主要从事元素分析方面的工作（E-mail）hebing1990@126．com。;通信作者：乔晴，工程师，硕士（E-mail）89478260@qq．com。
