环境保护科学2017，Vol.43Issue(2)：112-115,4.DOI:10.16803/j.cnki.issn.1004-6216.2017.02.022
石墨炉原子吸收分光光度法测定土壤中总铬
Determination of Total Chromium in Soils by Graphite Furnace Atomic Absorption Spectrometry
摘要
Abstract
An analytical method of determination of total chromium in soils by use of graphite furnace atomic absorption spectrometry (GFAAS) was established in this paper. Matrix interferences were completely eliminated by deducting background with Zeeman and appropriate ashing, atomization temperature, retention time and optimum dosage determination of calcium nitrate was ooptimized in the experiment. The results showed that when the atomization temperature was 2700 C, the ashing temperature was o700 C, the atomization time was 2 s, the ashing time was 9 s, and the modified dosage of the matrix was 3~5μL, the instrument reached to the best working conditions. Under the optimal conditions, the linear range of chromium was at 0~32.0μg/L and the correlation coefficient(r) was 0.9999, with the detection limit as 0.3 mg/kg. Precision of chromium determination of the standard soil samples (GSS-1and ESS-1) was all below 5%, with relative errors between -4.8% and -0.7%. Sensitivity and precision of the method complied with the requirements. Therefore, the method was highly sensitive with high atomization temperature and less interference suitable for the determination of total chromium in soils.关键词
石墨炉原子吸收分光光度法/土壤/总铬Key words
Graphite Furnace Atomic Absorption Spectrometry/Soil/Total Chromium分类
资源环境引用本文复制引用
段雪梅,陈帅帅,巢文军,张燕波,曾俊源,李文婷..石墨炉原子吸收分光光度法测定土壤中总铬[J].环境保护科学,2017,43(2):112-115,4.基金项目
国家自然科学基金项目(21107006 、41271498)资助 （21107006 、41271498）
