期刊论文

中文

应用化工

1671-3206

2015

44

1

172-174,177

10.16581/j.cnki.issn1671-3206.2015.01.012

国家自然基金青年基金项目支持（11205085）；

本校为第一机构

研究了一种共振光散射法测定水中痕量汞的新方法。 在稀硫酸介质中,KI 和Hg~(2+)形成[HgI_4 ]~(2-),与碱性阳离子染料孔雀石绿结合形成离子缔合物,使体系共振散射强度增强,并且增强程度与Hg~(2+)浓度(在4.20×10~(-8)~8.0×10~(-7) mol/L范围内)呈现良好的线性关系。方法检出限为1.26×10~(-8) mol/L,将该方法用于环境水中汞的测定,加标回收率为102.0%~106.8%,操作简便、快速,结果准确可靠。

A new Resonance Lights Sattering( RLS) method for the determination of trace mercury in water was established. In dilute sulfuric acid medium,the complex anion [Hg I4]2-formed by KI and Hg2 +reacted with Malachite green( MG) to form an ion-association compound,which can significant enhancement the intensity of RLS. The intensity of resonance light scattering was proportional to the concentration of Hg2 +in the range of 4. 2 × 10-8~ 8. 0 × 10-7mol / L with the detection limit for Hg2 +of 1. 26 × 10-8mol / L. The method was applied for the determinat...