微波消解-火焰原子吸收光谱法测定洗发水中硒的含量  

Determination of Selenium Content in Shampoo by Microwave Digestion-fl ame Atomic Absorption Spectrometry

作　　者：苏祖俭 吴绒 李颖瑜 刘钰泉 周瑞妮 梁旭霞 Su Zujian;Wu Rong;Li Yingyu;Liu Yuquan;Zhou Ruini;Liang Xuxia(Guangdong Provincial Institute of Biological Products and Materia Medica,Guangdong,510440;NMPA Key Laboratory for Safety Evaluation of Cosmetics,Guangdong,510440)

机构地区：[1]广东省生物制品与药物研究所,广东510440 [2]国家药监局化妆品安全评价重点实验室,广东510440

出　　处：《当代化工研究》2023年第23期69-71,共3页Modern Chemical Research

基　　金：广东省医学科学技术研究基金“广东食品安全风险监测数据一致性评价平菇汞形态参考物质制备技术研究”(项目编号:A2023039);广东省医学科学技术研究基金“国标《食品中多元素的测定》中锡、硒元素检测方法的修订”(项目编号:C2021086)。

摘　　要：本文建立了微波消解-火焰原子吸收光谱法测定洗发水中硒的含量的方法,方法线性范围为0.3~50.0μg/mL;当取样量为0.5g,定容体积为25mL时,本方法测定硒的检出限为4.5mg/kg,定量限为15mg/kg;采用不同浓度水平的硒标准溶液进行精密度试验,相对标准偏差(n=7)在0.6%~2.7%之间;采用人为添加二硫化硒的洗发水样品进行加标回收实验,回收率在90.0%~107.8%之间,满足《化妆品中禁用物质和限用物质检测方法验证技术规范》的技术要求。此方法具有优异的精密度、准确度和可操作性,适用于样品的批量测定,能在保证结果准确性的前提下大大提高检测效率。This paper establishes a method for the determination of selenium content in selenium disulfide lotion using microwave diges-tion-flame atomic absorption spectrometry.The linear range of the method is 0.3~50.0μg/mL;When the sampling volume is 0.5 g,the constant vol-ume is 25 mL,the detection limit of selenium determined by this method is 4.5 mg/kg,the quantification limit is 15 mg/kg.Selenium standard solutions of different concentration levels were used for precision testing,the relative standard deviations(n=7)are between 0.6% and 2.7%.A spiked recov-ery experiment was conducted using shampoo samples artificially added with selenium disulfide,the recovery rates are between 90.0% and 107.8%.The above data all meet the technical requirements of the"Technical Specifications for Verification of Detection Methods for Prohibited and Restrict-ed Substances in Cosmetics".The method has excellent precision,accuracy,and operability,making it suitable for batch determination of samples.It can greatly improve detection efficiency while ensuring the accuracy of the results.

关 键 词：微波消解 火焰原子吸收 二硫化硒 

分 类 号：TQ658[化学工程—精细化工]