摘要
采用ICP-OES同时测定功效牙膏中的铅、镉、汞、砷、铜、锌、钾、锶、银、钛等10种元素。结果表明,在HNO3-H2O2-HF体系下,采用微波消解方法,对牙膏样品进行完全消解。通过优化仪器条件参数,实现对功效牙膏中的铅、镉、汞、砷、铜、锌、钾、锶、银、钛等元素的ICP-OES法同时测定。钛、钾元素质量浓度在5.0-100.0 mg/L,锶、锌元素质量浓度在1.0-50.0 mg/L,铅、镉、汞、砷、铜、银元素质量浓度在0.1-2.0 mg/L范围内时,方法有良好的线性关系,相关系数均大于0.992。样品中各元素的加标回收率在93.0%-109.0%。
A method is established for the simultaneous determination of lead, cadmium, mercury, arsenic, copper, zinc, potassium, strontium, silver and titanium in toothpaste by ICP-OES. Experiment indicated that the toothpaste samples could be fully digested with microwave digestion in the HNO3-H2O2-HF system. By optimizing the instrument condition parameters, simultaneous determination of lead, cadmium, mercury, arsenic, copper, zinc, potassium, strontium, silver, titanium in toothpaste by ICP-OES was realized. The method shows good linearity within the range of 5.0 - 100. 0 mg/L for titanium and potassium, 1.0 - 50. 0 mg/L for strontium and zine, and 0. 1 - 2. 0 mg/L for other elements with the correlation coefficients higher than 0. 992. The recoveries of metal elements are between 93.0% - 109.0%. The analysis results demonstrate that the proposed method has good accuracy and precision, high sensitivity, low detection limit, wide linear range, less interference between elements and show high feasibility in the determination of heavy metal elements in toothpaste.
出处
《分析试验室》
CAS
CSCD
北大核心
2016年第2期197-200,共4页
Chinese Journal of Analysis Laboratory
作者简介
E-mail：xzyu28@163．com
