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[目的]建立了原子吸收光谱法测定植烟土壤中交换性钙镁含量的分析检测方法。[方法]对提取时的称重量、提取液体积和提取方式,氯化锶加入量进行了试验,同时考察了不同pH样品的适用性,方法的稳定性、精密度和准确度。[结果]该方法操作简单、测定结果准确可靠、稳定性好、精密度高、适用性广。[结论]该方法适用于植烟土壤中交换性钙镁含量的测定。
[Objective] The research aimed to establish an analytical method for the determination of exchangeable calcium and magnesium in tobacco-planting soil by atomic absorption spectrometry. [Method] The weight of the extract, the volume of the extract, the extraction method and the amount of strontium chloride were tested. The applicability of different pH samples, the stability, precision and accuracy of the method were also investigated. [Result] The method was simple in operation, accurate and reliable in determination results, good in stability, high in precision and wide in applicability. [Conclusion] The method was suitable for the determination of exchangeable calcium and magnesium in tobacco planting soil.