摘要
本文建立了一种使用激光剥蚀-电感耦合等离子质谱法(LA-ICP-MS)对高含量银饰品中22种杂质元素测定的检测方法,实现了对高纯银饰品的准确、高效、绿色环保的近无损测试。通过对Mg、Al、Ti、Cr和Mn等5个目标元素的测试,计算出当激光剥蚀系统能量密度为12.5 J/cm^(2)、剥蚀孔径为90μm、脉冲频率为10 Hz时为最优参数,目标元素的信号强度和稳定性达到最优。使用系列银标准样品建立工作曲线,对待测高含量银饰品进行测试。该方法的检出限为0.001~0.827μg/g,各杂质元素的精密度在3%~25%之间,测试结果与ICP-AES的数据相吻合。
In this paper,a method for the determination of 22 impurity elements in high purity silver ornaments by laser ablation-inductively coupled plasma mass spectrometry(LA-ICP-MS)was established.The near non-destructive testing of high-purity silver jewelry was realized with high accuracy,high efficiency and environmental protection.Through the test of five target elements Mg,Al,Ti,Cr and Mn,it is calculated that when the laser ablation system energy density is 12.5 J/cm^(2),the ablation aperture is 90μm,and the pulse frequency is 10 Hz,the signal strength and stability of the target elements are optimized.A series of silver standard samples are used to establish the working curve,and the high purity silver ornaments to be tested.The detection limit of this method is 0.001~0.827μg/g,the precision of each impurity element is 3%~25%,and the test results are consistent with the data of ICP-AES.
作者
黄博崚
王璇
朱勇
沈佳妮
杨婷婷
马清正
李岚森
杨茜涵
HUANG Bo-ling;WANG Xuan;ZHU Yong;SHEN Jia-ni;YANG Ting-ting;MA Qing-zheng;LI Lan-sen;YANG Xi-han(National Jewelry Testing Center(Chong Qing),Chongqing Academy of Metrology and Quality Inspection,Chongqing 401121,China)
出处
《贵金属》
CAS
北大核心
2021年第4期71-75,86,共6页
Precious Metals
基金
重庆市科研机构绩效激励引导专项(cstc2018jxj100003)
重庆市计量质量检测研究院自立科研项目(2022(研)-05)。
