摘要
研究了在非离子表面活性剂TritonX-100存在下，1-吡啶-3-[4-（苯基偶氮）苯基]-三氮烯（PYPAPT）与银离子反应的条件，建立了测定银的分光光度法。在NaOH碱性介质中，银与PYPAPT反应生成1：2红棕色络合物，络合物的最大负吸收峰位于530nm。表观摩尔吸光系数为4.23×10^4L·mol^-1·cm^-1，银离子含量在0-2．5mg／L范围内符合比尔定律。方法用于粗铅矿样中银离子的测定，结果与原子吸收光谱法测定结果一致。
The color reaction of 1-pyridine-3-（4-phenylazophenyl）-triazene（PYPAPT） with silver was studied. In the presence of nonionic surfactant TritonX-100 and in the medium of NaOH, silver can react with 1-pyridine-3-[4-phenylazophenyl]-triazene to form a reddish-brown complex with ratio of 1：2. The maximum negative absorption of the complex is at 530 nm, at which apparent molar absorp-tivity of the complex is 4.23×10^4L·mol^-1·cm^-1. Beer＇s law is obeyed in the range of 0-2.50 mg/L for silver. The proposed method has been applied to the determination of silver in lead ore sampies. The results are consistent with the values obtained hv atomic absorption spectrometry.
出处
《冶金分析》
CAS
CSCD
北大核心
2008年第4期65-67,共3页
Metallurgical Analysis
基金
湖南省自然科学基金项目(06JJ2015)
