摘要
建立了离子色谱法测定玩具中可迁移Cr（Ⅵ）的新方法。玩具中的可迁移Cr（Ⅵ）经0.07mol/L的HCl提取后,经过AS7阴离子柱进行分离和富集,再与1,5-二苯卡巴肼（DPC）反应进行衍生,用紫外检测器在530nm处进行检测。该方法对玩具材料中Cr（Ⅵ）的检出限为0.005mg/kg;在0.1～50μg/L范围内呈现良好的线性关系,相关系数r2为0.9997;Cr（Ⅵ）的回收率范围为92.8%～102.4%,相对标准偏差为0.8%～5%。方法的灵敏度高,操作简便,基本能满足玩具新指令对玩具材料中可迁移Cr（Ⅵ）的检测要求。
A method for determinating migratory chromium（Ⅵ） in toys by ion chromatography has been developed in this article. The Cr（Ⅵ） in toys was extracted by 0.07 mol/L HCl, seprated and preconcentrated by AS7 anion column, then derived with 1, 5-diphenylcarbazide （DPC）, and finally detected at 530 nm by UV detector. The detection limit was found to be 0. 005 mg/kg of Cr（Ⅵ） in toys, the linearity of the calibration curve for Cr（Ⅵ） was in the range of 0. 1-50 μg/L（r2=0. 9997）,the spiked recoveries were in the range of 92.8%-102.4% with the RSDs of 0.8%- 5%. This method was easy to operate with high sensitivity, which can meet the requirements of new directive for determination of migratable Cr（Ⅵ） in toy materials.
出处
《分析科学学报》
CAS
CSCD
北大核心
2016年第4期585-588,共4页
Journal of Analytical Science
基金
广东省质量技术监督局科技计划(No.20132203)
关键词
玩具
六价铬
离子色谱
柱后衍生
Toy
Chromium（ Ⅵ ）
Ion chromatography
Post-column derivatization
