期刊论文

Feng, Y.-L.

中文

冶金分析

1000-7571

2006

26

3

53-55

10.3969/j.issn.1000-7571.2006.03.015

(04FJ3026):湖南省科技厅科技攻关项目

本校为第一且通讯机构

在Triton X=100存在下的pH10的Na2B4O7-NaOH缓冲介质中，研究了1-吡淀-3-[4-（苯基偶氮）苯基]-三氮烯（PYPAPT）与汞离子（Hg^2＋）的显色反应，建立了微量汞的测定方法。Hg^2＋与PYPAPT形成1：2的红色络合物，络合物最大吸收波长位于518nm，表观摩尔吸光系数为1．42×10^5L·mol^-1·cm^-1，Hg^2＋质量浓度在0～0．64mg／L范围内符合比尔定律。方法用于铅锌矿样中微量汞的测定，RSD小于2．6％，测定结果与AAS法相符。

The color reaction of l-pyridine- 3-(4-phenylazophenyl)-triazene(PYPAPT) with mercury(II) has been studied. Results show that the mercury(II) reacts with PYPAPT to form a red complex with a molar ratio of 1 : 2 in the presence of Triton X-100 and in the medium of Na2B4O7 - NaOH buffer solution at pH10. The maximum absorption of the complex is at 518 nm and the apparent molar absorptivity is 1.42 x 105L ·mol-1 ·cm-1. Beer's law is obeyed in the range of 0~0.64 mg/L for mercury(II). The results obtained by this method are agreement with those obtained by AAS method. The RSD is less...