摘要
研究了 2 羟基 5 磺酸基苯基重氮氨基偶氮苯 (HSDAA)与汞 (Ⅱ )的显色反应。在TritonX 10 0存在下 ,于pH 10 30的硼砂 氢氧化钠缓冲溶液中 ,汞 (Ⅱ )与试剂形成 1∶2的稳定橙红色配合物 ,其最大吸收波长位于 5 19nm处 ,表观摩尔吸光系数为 1 6 7× 10 5L·mol- 1 ·cm- 1 。汞 (Ⅱ )在 0～ 6 0 0 μg·L- 1 之间符合朗伯 比尔定律。该法直接应用于水样中痕量汞的测定。
The chromogenic reaction of 2-hydroxy-5-sulfobenzenediazoaminoazobenzene (HSDAA) with mercury was studied. In the presence of Triton X-100 and in a borax-buffer solution of pH 10. 30, mercury(II) reacted with HSDAA to form a stable orange-red complex with molar radio of 1 : 2. The apparent molar absorptivity was 1.67 X 10(5) (.) L mol(-1) (.) cm(-1) with the maximum absorption wavelength of 519 nm. Beer's law was obeyed in the concentration range of 0-600 mug(.)L(-1) for Hg(II). The method was applied to the determination of trace amounts of mercury in water with satisfactory results.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2004年第4期474-476,共3页
Spectroscopy and Spectral Analysis
基金
广东省自然科学基金项目 (980 383)
广东省重点科技攻关项目 (99M0 530 1G)资助
