摘要
采用微波消解-电感耦合等离子体质谱法测定可食性油墨中的铬、砷、硒、镍、铁、锰、铜、铅、镉、锑、锌、钡和铝等13种化学元素。以硝酸-过氧化氢(3+2)混合液为消解剂对样品进行微波消解,以铋、锗、钪和铟作为内标消除基体干扰,采用碰撞/反应池技术和干扰校正公式消除质谱干扰。各元素的质量浓度在一定范围内与其对应的信号强度呈线性关系,相关系数在0.999 1~0.999 9之间,方法的检出限(3s/k)在0.003~2mg·kg^(-1)之间。加标回收率在80.0%~110%之间,测定结果的相对标准偏差(n=7)在2.3%~7.3%之间。
ICP-MS with microwave digestion was applied to the determination of thirteen chemical elements in edible ink. After the samples were digested by microwave with a mixture of nitric acid and hydrogen peroxide （3＋ 2）, Cr, As, Se, Ni, Fe, Mn, Cu, Pb, Cd, Sb, Zn, Ba and A1 in the samples were analyzed by using Bi, Ge, Sc and In as internal standard elements to eliminate the marrix interference, and by using collision/reaction cell technology and interference correction formula to eliminate the MS interference. Linear relationships were found between the signal intensity and the mass concentration of the thirteen elements in defined ranges with correlation coefficients in the range of 0. 999 1 --0. 999 9, and the detection limits （3s/k） varied from 0. 003 mg· kg^-1 to 2 mg · kg^- 1. Recovery rates obtained by standard addition method were in the range of 80.0%- 110% and RSDs （n=7） were in the range of 2.3%-7.3%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2017年第3期284-288,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
国家质检总局科技计划项目(2015IK060
2015IK075
2015IK260)
中山市社会公益重大专项(2015B2295)
