摘要
采用自制工作波长1 064 nm的Nd:YAG激光器,作为ICP-AES的固体进样系统。根据Fe元素强度及其他元素相对强度的稳定性,对分析条件进行了优化。优化的分析条件为:激光频率10 Hz,激光电压760 V,氩气流量0.7 L/min,RF功率1 350 W,离焦量10 mm。在优化的分析条件下,分析了中低合金钢中的Cr,Cu,Mn,Mo,Ni,Si,V,Ti等8个元素,除Si元素外,其它元素线性相关系数均大于0.999 0。元素检测限除Ni元素为79μg/g外,其它元素均低于50μg/g。试验结果表明,固体样品不需要前处理,应用自制激光剥蚀系统可以直接分析。测定标准样品结果与认定值相吻合,除低含量的Si,Ti元素外,RSD均小于7%。
The home-made Nd-YAG laser with the wavelength of 1 064 nm was used as the solid sample introduction system of inductively coupled plasma -atomic emission spectrometry （ICP-AES）. According to the influence of Fe intensity and other elements relative intensity on stability, analytical conditions were optimized and the results obtained were as follows： laser frequency of 10 Hz, laser voltage of 760 V, argon flush rate of 0.7 L/min, RF power of 1 350 W, and defocus distance of 10 mm. Under the optimum conditions, eight elements including Cr, Cu, Mn, Mo, Ni, Si, V and Ti in middle-low alloy steel were analyzed. It was found that the correlation coefficients of the elements except Si were more than 0. 999 0 and the detection limits of the elements were less than 50 μg/g except Ni of 79μg/g. The results indicated that the home-made laser sample ablation system can be success- fuly used to analyze solid samples without pre-treatment. The determination results of standard samples are agreement with the certified values,with RSD of below 7 % except low content Si,Ti.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2007年第6期14-19,共6页
Metallurgical Analysis
基金
科技部仪器升级改造项目(JG-2003-25)
