提高原子吸收光谱仪测定冰雪样品的灵敏度  

Improving Sensitivity of Atomic Absorption Spectrometer in Measurment of Snow/ice Sample

作　　者：皇翠兰[1] 姚檀栋[1] 蒲健辰[1] 田立德[1] 段克勤[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所冰芯与寒区环境开放研究实验室

出　　处：《分析测试技术与仪器》1999年第2期122-125,共4页Analysis and Testing Technology and Instruments

基　　金：九.五"国家攀登计划项目;国家自然科学基金;中国科学院九.五重大项目;国家自然科学基金

摘　　要：冰雪样品离子含量低，用原子吸收光谱测定阳离子，有些离子不能得到满意的结果，改用撞击球替代绕流器雾化，各离子吸光度大大提高，通过一系列试验对比，结果Ｃａ２＋吸光度提高１．２倍，Ｍｇ２＋、Ｎａ＋、Ｋ＋吸光度提高了２至３倍，解决了冰雪样品离子含量低。The ion concentrations in snow and ice are sometimes too low to be determined accurately by atomic absorption spectrophotometry. However, the absorbance can be increase rapidly by using the impact bead instead of plastic flow spoiler. The results of a series of control experiments show a 1.2fold improvement has been made in absorbance for Ca\+2+, 23fold improvment for Mg\+2+,Na\++ and K\++, which solves the measuring problems of snow and ice samples with low ion concentrations.

关 键 词：原子吸收光谱仪 离子 灵敏度 冰芯 冰雪样 测定 

分 类 号：P343.6[天文地球—水文科学] P532[天文地球—地球物理学]