期刊论文

中文

应用化工

1671-3206

2009

38

12

1817-1819,1821

10.16581/j.cnki.issn1671-3206.2009.12.034

本校为第一机构

建立一种环境水样中总锰的共振光散射分析新方法.在pH=6.0的Tris-HCl缓冲溶液中,锰(Ⅶ)氧化二甲基亚砜(DMSO)成为二甲基砜(DMSO_2),生成的Mn~(2+)与DMSO_2结合形成离子缔合物,使体系的共振光散射急聚增强.在优化的实验条件下,在6.3×10~(-9)～7.5×10~(-5)mol/L浓度范围内,体系的△I值与锰(Ⅶ)浓度之间具有良好的线性关系,线性回归方程为△I_(RLS)＝-217.3+ 114.7 c (r = 0.999 1);检出限为1.9×10~(-9)mol /L;样品加标回收率为102.3%～106.5%.该法简便,特异,灵敏度高.用于环境水样中总锰的测定,结果满意.

A novel resonance light scattering method was established for the determination of trace total manganese in environmental water. Mn （ Ⅶ ） oxidates dimethyl sulfoxide （DMSO） to dimethyl sulfone （DMSO2 ） at pH =6.0 of Tris-HCl buffer solution, Mn（ Ⅱ） could react with dimethyl sulfone to form an ion association complex, so that the system＇ s scattering intensity of RLS is enhanced. Under the optimal experimental conditions, compared to the system＇s scattering intensity, Mn（Ⅶ） concentration had a good linear relationship in the range...