电感耦合等离子体质谱法同时测定植物类新食品原料中14种无机元素
发布时间：2018-08-15 15:34
【摘要】：0.500 0g样品经硝酸3mL、过氧化氢2mL消解后,采用电感耦合等离子体质谱法同时测定样品溶液中Na、Mg、Ca、Al、Cu、Zn、Fe、Mn、Se、Pb、Cd、As、Hg和Cr的含量。采用0.5%(体积分数)硝酸的基体酸度增强分析元素的信号强度;在两次测试之间用100μg·L-1 Au-5%(体积分数)硝酸溶液清洗仪器,降低Hg的吸附效应;利用甲烷碰撞动态反应池技术消除了分析过程中的质谱干扰,选择Sc、Y、In、Bi为内标元素校正基体效应。14种元素的质量浓度在一定范围内与信号强度呈线性关系,检出限(3s)在0.003~0.039μg·L~(-1)之间。方法用于分析国家标准物质GBW 10027,各元素测定值与认定值相符,测定值的相对标准偏差(n=6)在1.6%~14%之间。
[Abstract]:0.500 g samples were digested by 3 mL nitric acid and hydrogen peroxide 2mL, and the contents of HG and Cr in the sample solution were determined by inductively coupled plasma mass spectrometry (ICP-MS). The matrix acidity of 0.5% (volume fraction) nitric acid was used to enhance the signal intensity of the analysis elements, and the adsorption effect of Hg was reduced by cleaning the instrument with 100 渭 g L-1 Au-5% (volume fraction) nitric acid solution between the two tests. The mass interference of mass spectrometry in the process of analysis was eliminated by using the dynamic reaction cell technique of methane collision. The mass concentration of 14 elements was linearly correlated with the signal intensity in a certain range, and the detection limit (3s) was 0.0030.039 渭 g / L ~ (-1). The method has been applied to the analysis of the national standard material GBW 10027. The measured values of each element are in agreement with the determined values, and the relative standard deviation (nc6) of the determination values is between 1.6% and 14%.
【作者单位】： 安徽出入境检验检疫局食品安全分析与检测安徽省重点实验室;
【基金】：国家质检总局科技项目(2014IK134) 安徽省自然科学基金(1408085MKL96) 安徽省科技计划项目(1604b0602028,1606c08237)
【分类号】：O657.63;TS202.1
，
本文编号：2184642
[Abstract]:0.500 g samples were digested by 3 mL nitric acid and hydrogen peroxide 2mL, and the contents of HG and Cr in the sample solution were determined by inductively coupled plasma mass spectrometry (ICP-MS). The matrix acidity of 0.5% (volume fraction) nitric acid was used to enhance the signal intensity of the analysis elements, and the adsorption effect of Hg was reduced by cleaning the instrument with 100 渭 g L-1 Au-5% (volume fraction) nitric acid solution between the two tests. The mass interference of mass spectrometry in the process of analysis was eliminated by using the dynamic reaction cell technique of methane collision. The mass concentration of 14 elements was linearly correlated with the signal intensity in a certain range, and the detection limit (3s) was 0.0030.039 渭 g / L ~ (-1). The method has been applied to the analysis of the national standard material GBW 10027. The measured values of each element are in agreement with the determined values, and the relative standard deviation (nc6) of the determination values is between 1.6% and 14%.
【作者单位】： 安徽出入境检验检疫局食品安全分析与检测安徽省重点实验室;
【基金】：国家质检总局科技项目(2014IK134) 安徽省自然科学基金(1408085MKL96) 安徽省科技计划项目(1604b0602028,1606c08237)
【分类号】：O657.63;TS202.1
，
本文编号：2184642
本文链接：https://www.wllwen.com/kejilunwen/huaxue/2184642.html
教材专著
