期刊论文

Liao, L.-F.

中文

核化学与放射化学

0253-9950

2007

29

3

156-160

10.3969/j.issn.0253-9950.2007.03.006

国家自然科学基金资助项目（10475038）；

本校为第一且通讯机构

为探究不经分离直接定量分析含有钍、镧等元素混合物中的铀,以偶氮胂Ⅲ为显色剂,建立了酸度-光谱双线性数据矩阵秩消失因子分析法.结果表明,当pH=0.3 ～ 4.8 ,λ为600 ～ 680 nm时,方法的检出限为0.085 mg/L;当混合物中铀的质量浓度为1.19 ～ 4.76 mg/L时,相对标准偏差为1.5% ～ 4.2%.用该方法对实际样品进行了测定,加标回收率为 97.5% ～ 103.4%.

For searching direct quantitative analysis of uranium in grey mixtures containing thorium and lanthanum without any separate process, a rank annihilation factor analysis of the acidity-spectra bilinear data matrices with arsenazo III as a chromogenic reagent was established. The range of acidity is pH = 0.3-4.8 and the range of wavelength is 600-680 nm in the process of measure. The results show that the detection limit of the method is 0.085 mg/ L and the relative standard deviations are from 1.5% to 4.2% when the mass concentrations of uranium in the mixtures are from 1.19 mg/L to 4.76 mg/L....