Chatterjee Sukumar, Pillai Ajay, Gupta V K
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh 492010, India.
Talanta. 2002 May 24;57(3):461-5. doi: 10.1016/s0039-9140(02)00037-1.
In the present method a new reagent o-carboxyphenyl diazoamino p-azobenzene has been synthesised for the determination of mercury spectrophotometrically. The method is based on the reaction of mercury with the reagent in alkaline medium where the reagent is in the aci-form. The purple violet coloured dye-mercury complex showed an absorption maxima at 540 nm. Beer's law is valid over the concentration range of mercury from 0.08 to 0.8 mug ml(-1) (0.08-0.8 ppm). The molar absorptivity and Sandell's sensitivity were found to be 2.22x10(5) mol(-1) cm(-1) and 0.0009 mug cm(-2), respectively. The method has been successfully applied to the determination of mercury in air, water, soil and fungicide samples.
在本方法中，合成了一种新的试剂邻羧基苯基重氮氨基对偶氮苯，用于分光光度法测定汞。该方法基于汞与试剂在碱性介质中的反应，此时试剂呈酸式。紫色的染料-汞络合物在540nm处有最大吸收峰。在汞浓度为0.08至0.8μg ml⁻¹（0.08 - 0.8 ppm）范围内符合比尔定律。摩尔吸光率和桑德尔灵敏度分别为2.22×10⁵ mol⁻¹ cm⁻¹和0.0009μg cm⁻²。该方法已成功应用于空气、水、土壤和杀菌剂样品中汞的测定。
