摘要
在稀硝酸介质中,以2-(3-羧基苯偶氮)-7-(4-氯-2-膦酸基苯偶氮)-1,8-二羟基-3,6-萘二磺酸(CPA-mK)作为显色剂,建立了一种测定微量铀的流动注射分光光度法,在最佳实验条件下,该方法的线性范围为0—35mg/L,检出限为0.026mg/L,应用该方法测定煤灰样品中的铀,其相对标准偏差为1.8%—3.2%,加标回收率为98.1%—102.3%。
The method for the determination of micro uranium was established by flow injection spectrophotometry with 2-（3-carboxyphenylazo）-7-（4-chlorine-2-phosphonicphenylazo）-1,8-di-hydroxyl-3,6-naphthalene-disulfonic acid（CPA-mK） as colour-developing agent in the dilute nitric acid.Under the optimal conditions,the linear for method was in the ranger of 0—35mg/L,and the detection limitation was 0.026 mg/L.The method was applied to the determination of micro uranium in coal ash with the relative standard deviation of 1.8%—3.2% and the recovery of 98.1%—102.3%.
出处
《光谱实验室》
CAS
CSCD
北大核心
2011年第4期2107-2110,共4页
Chinese Journal of Spectroscopy Laboratory
