激光蒸发进样ICP－AES测定地质祥品中的钡和锶  

LASER VAPORIZATION SAMPLING ICP-AES FOR ANALYSIS OF BARIUM AND STRONTIUM IN GEOLOGICAL SAMPLES

作　　者：郑存江[1] 吴超[1] 陈艳玲[1] 林守麟[1] 

机构地区：[1]中国地质大学应用化学系,地矿部西安综合岩矿测试中心

出　　处：《光谱学与光谱分析》1995年第6期67-72,78,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金

摘　　要：本文讨论了用连续ＣＯ＿２激光器蒸发地质粉末样品，ＩＣＰ－ＡＥＳ测定Ｂａ和Ｓｒ。在样品中加入适量的粘合剂和石墨粉混匀压饼，用激光全部蒸发。在蒸发室出口处加入了一只多层多孔过滤器，一定程度上改善了系统长时间工作的稳定性。对影响激光采样和ＩＣＰ－ＡＥＳ分析性能的参数进行了研究。实验结果表明，连续激光蒸发地质粉末样品、ＩＣＰ－ＡＥＳ测定Ｂａ、Ｓｒ，大部分分析结果满意。在选择的系统条件下，Ｂａ、Ｓｒ的检出限分别为２．６μｇ·ｇ￣－１和３．０μｇ·ｇ￣－１；精密度ＲＳＤ分别为６．３％（４７０μｇ·ｇ￣－１）和５．６％（５２μｇ·ｇ￣－１）Barium and Strontium of powdered materials in geological samples were determined by ICP-AES with C W CO_2 laser vaporizaton sampling. The samples were mixed with graphite powder and polyamide, then pressurized its into pellets. A multi-hole laminar filterwas applied in the outlet of vaporization chamber,it could improve the stability of ICP system in long period. The experimental conditions required were investigated in detain. Nice results were obtained in the analysis of geological and pyrite samples. The detectionlimit are 2. 6μg· g￣-1 for Ba and 3. 0μg· g￣-1 for Sr, respectively. The reproducibility of themeasurements are 6. 3% (Ba470μg· g￣-1) and 5. 6% (Sr52μg· g￣-1).

关 键 词：ICP-AES 激光蒸发进样 地质样品 钡 锶 岩石 

分 类 号：P585.2[天文地球—岩石学] O614.23[天文地球—地质学]