摘要
采用电感耦合等离子体发射光谱（ICP-AES）对铀污染土壤植物中铀的测定方法进行了研究。在λU385.958 nm处,选择了仪器的最佳工作条件,考察了酸度和常见共存元素对测定的干扰情况,并且对比了干灰化消解和湿式消解对测定的影响。研究发现2%硝酸溶液为最佳介质,干扰离子对测定没有显著影响,干灰化消解比湿式消解得彻底。在选定条件下,方法检出限为0.18 mg.L-1,测定下限为0.61 mg.L-1,5.0000 mg.L-1的铀标准溶液的相对标准偏差RSD（n=10）为0.81%,方法回收率为96.2%~106.2%。该方法操作简单,快速。结果表明,用ICP-AES测定铀污染土壤植物样品中的铀是可行的。
A method has been developed for the determination of Uranium in plants grown in U -contaminated soil by inductively coupled plasma atomic emission spectrometry （ ICP- AES）. The operating conditions of the instrument were optimized at λu385. 958 nm. The interferences from the acidity and common coexistent elements were studied and comparisons between the dry ashing and wet digestion were made. The results showed that 2% nitric acid was the optimal medium; interfering ions had no significant effect on determination; dry ashing digestion was better than wet digestion. Under the selected conditions, the detection limit was 0. 18 mg· L^-1 and the determination low limit is 0. 61 mg · L^-1. The relative standard deviation RSD （n = 10） was 0. 81% for 5. 0000 mg ·L^-1 uranium standard solution. The recovery range were 96. 2% ～ 106. 2%. The results showed that the method was convenient,simplified, and the determination of uranium in plants grown in U -contaminated soil by ICP-AES was applicable.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2009年第11期1529-1532,共4页
Chemical Research and Application
基金
国家自然科学基金资助项目(10776021)
