Agrawal O, Sunita G, Gupta V K
Pt. Ravishankar Shukla University, School of Studies in Chemistry, Raipur, India.
J AOAC Int. 1998 Jul-Aug;81(4):803-7.
A new, simple, and sensitive spectrophotometric method is described for determination of pentachlorophenol, a widely used insecticide and herbicide, in various environmental samples. The method is based on the reaction of pentachlorophenol with concentrated nitric acid to form chloranil, which liberates iodine from potassium iodide. The liberated iodine then selectively oxidizes leucocrystal violet to form crystal violet, which has an absorption maximum at 592 nm. Beer's law is obeyed over the concentration range of 0.1-1.6 micrograms pentachlorophenol/25 mL (0.004-0.064 ppm). The method was applied satisfactorily to determination of pentachlorophenol in air, water, plant material, textile effluent, and biological samples.
描述了一种用于测定各种环境样品中五氯苯酚（一种广泛使用的杀虫剂和除草剂）的新的、简单且灵敏的分光光度法。该方法基于五氯苯酚与浓硝酸反应生成四氯对苯醌，四氯对苯醌从碘化钾中释放出碘。释放出的碘然后选择性地将无色结晶紫氧化形成结晶紫，结晶紫在592nm处有最大吸收。在0.1 - 1.6微克五氯苯酚/25毫升（0.004 - 0.064ppm）的浓度范围内符合比尔定律。该方法已成功应用于空气、水、植物材料、纺织废水和生物样品中五氯苯酚的测定。
