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

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,测定难的问题.

Abstract: 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 1.2-fold improvement has been made in absorbance for Ca²⁺, 2~3-fold improvment for Mg²⁺,Na⁺ and K⁺, which solves the measuring problems of snow and ice samples with low ion concentrations.