火焰原子吸收光谱法测定钙、镁背景吸收校正问题的探讨

On Background Absorption Correction Problems in Determining Calcium and Magnesium by Atomic Absorption Spectrometry Method

指出了原子吸收光谱法对钙、镁离子浓度的测定受火焰条件、试样有背景吸收等因素影响,利用原子吸收光谱法对钙、镁标准样品进行了实验室分析,研究了自吸效应背景校正法和连续光源背景校正法测定钙、镁元素的准确度。结果表明:当火焰条件固定,测定钙元素时,选择自吸效应背景校正法的测定准确度高于连续光源背景校正法;测定镁元素时,连续光源背景校正法的测定准确度高于自吸效应背景校正法。

Atomic absorption spectrometry for the determination of calcium and magnesium ion concentration is influenced by factors such as flame conditions, sample background absorption of calcium and magnesium and so on. This article analyzes the standard laboratory samples by using atomic absorption spectrometry method, and studies the effects of imbibition background correction method and continuous light background correction method on the accuracy of the determination of calcium and magnesium. The results show that when the flame conditions are fixed, the measuring accuracy of self--priming effect correction method is higher than that of the continuous light background correction method when determining calcium, and the re- sult is on the contrary when determining magnesium.