摘要
试验研究了HNO3-HCl、HNO3-H2O2和HNO3-H2SO4等几种不同混合酸的微波消解体系对土壤和蔬菜汞测定结果的影响,确定了微波消解样品的最佳条件.方法的检出限为0.019μg/L,对土壤标样和植物进行了9次重复测定,相对标准偏差分别为5.8%和4.1%.方法简便快速,具有高灵敏度和良好的准确度,应用于桂林市郊菜地土壤和蔬菜中痕量汞的测定,结果明显优于常见的湿法消解,采用标准试样对照,实验值与推荐值基本相符.
The application of microwave digestion in the determination of sample preparation of soil and vegetable for Hg by continual flow injection hydride atomic absorption spectrometry is described.The best conditions of digestion soil and vegetable sample are studied.The method is simple and rapid,with high sensitivity and good precision and accuracy.The detection limit for Hg(Ⅱ) is 0.019 μg/ L.The relative standard deviation(RSD) of soil and vegetable calculated from 9 times of determinations is 5.8% and 4.1% respectively.The results show that the microwave digestion is more reliable than that in current wet digestion. The proposed method has been applied to the determination of Hg (Ⅱ) in Guilin soil and vegetable sample with satisfactory results.
出处
《桂林工学院学报》
CAS
北大核心
2005年第2期217-220,共4页
Journal of Guilin University of Technology
基金
广西自然科学基金资助项目(桂科自0135045)
广西区教育厅科研项目(桂教科研[2003]22)
关键词
汞
土壤
蔬菜
微波消解
氢化物原子吸收光谱法
mercury
soil
vegetable
microwave digestion
hydride atomic absorption spectrometry
