激光剥蚀-电感耦合等离子体质谱法测定纯金中18种杂质元素

Determination of 18 impurity elements in pure gold by laser denudation-inductively coupled plasma-mass spectrometry

摘要: 采用激光剥蚀-电感耦合等离子体质谱法测定纯金中Ag、As、Bi、Cd、Co、Cr、Cu、Fe、Ir、Mg、Mn、Ni、Pb、Pd、Pt、Rh、Te、Zn等18种杂质元素。以系列金标样绘制标准曲线，并优化了仪器最佳工作参数。在激光能量为60 %、剥蚀孔径为110 μm、扫描速率为50 μm/s、脉冲频率为10 Hz、载气流量为0.80 L/min的条件下，各元素标准曲线的线性系数为0.965 0～0.999 5，检出限为0.010～0.660 μg/g，测定结果（除Fe、Ni外）相对标准偏差为0.75 %～11.42 %。采用本方法测定纯金中杂质元素，结果与ICP-AES测定结果吻合。

Abstract: Laser denudation-inductively coupled plasma-mass spectrometry is used for determination of 18 the impurity elements such as Ag,As,Bi,Cd,Co,Cr,Cu,Fe,Ir,Mg,Mn,Ni,Pb,Pd,Pt,Rh,Te,Zn.Standard curve is mapped with gold standard samples and optimal working parameters are optimized.When the laser energy is 60 %,denudation bore diameter is 110 μm,scanning rate is 50 μm/s,impulse rate is 10 Hz and the carrier gas flow is 0.80 L/min,the linear coefficient of the standard curve of each element is 0.965 0-0.999 5,the detection limit of each element is 0.010-0.660 μg/g,the relative standard deviation (RSD) is 0.75 %-11.42 %(except for Fe,Ni).The results of impurity elements determination in pure gold with this method are consistent with ICP-AES.