微波消解-火焰原子吸收测定土壤中的铬和锌（英文）

Determination of Chromium and Zinc in Soil by Microwave Digestion and Flame Atomic Absorption Spectrometry

[目的]探索一种简单快捷的利用原子吸收光谱法测定土壤中的铬和锌的方法。[方法]利用微波消解样品,建立了原子吸收光谱法测定土壤中的铬和锌的方法。[结果]铬在0~0.8 mg/L浓度范围内和锌0~0.8 mg/L浓度范围内的校正曲线呈线性,检出限分别为0.002 5 mg/L和0.002 3 mg/L。3个土壤样品铬和锌的加标回收率分别为102.4%~103.2%、97.7%~98.3%。[结论]该方法操作简单、灵敏度高、高效,适合土壤样品中铬和锌的测定。

[Objective] The aim was to develop a rapid, simple method for determination of chromium and zinc in soil samples by flame atomic absorption spectrometry.[Method] The method for determination of Cr and Zn in soil by combined flame atomic absorption spectrometry and microwave digestion was used. [Result] The concentration curve was linear within the range of 0-0.8 mg/L for Cr and 0-0.8 mg/L for Zn, the detection limits of Cr and Zn was 0.0025 mg/L and 0.002 3 mg/L, respectively. Recoveries of 102.4%-103.2% for Cr and 97.7%-98.3% for Zn were obtained for there soil samples. [Conclusion] The proposed method has the advantages of simple operation, high sensitivity, and high efficiency; it was successfully used for determination of Cr and Zn in soil samples.