Revanasiddappa D, Kumar N Kiran
Department of Chemistry, University of Mysore, Manasagangothri, India.
Anal Bioanal Chem. 2003 Jan;375(2):319-23. doi: 10.1007/s00216-002-1665-4. Epub 2002 Dec 7.
A new, simple, highly sensitive and rapid spectrophotometric method has been described for the determination of platinum(IV). The method is based on the oxidation of leuco xylene cyanol FF (LXCFF) to its blue form of xylene cyanol FF by platinum(IV) in sulfuric acid medium (pH 1.0-2.5), the formed dye shows an absorption maximum at 620 nm in acetate buffer medium (pH 3.0-4.5). The method obeys Beer's law over a concentration range of 0.3 to 2.6 micro g mL(-1) platinum, having molar absorptivity and Sandell's sensitivity of 5.1x10(4) L mol(-)(1) cm(-1) and 0.0038 micro g cm(-2), respectively. The optimum reaction conditions and other analytical parameters have been evaluated. The developed method has been successfully applied to the determination of platinum in pharmaceutical preparations, soil, natural water, plant material, platinum-containing catalyst, and synthetic alloy samples.
已描述了一种用于测定铂（IV）的新型、简单、高灵敏度且快速的分光光度法。该方法基于在硫酸介质（pH 1.0 - 2.5）中，铂（IV）将无色二甲苯蓝FF（LXCFF）氧化为其蓝色形式的二甲苯蓝FF，所形成的染料在乙酸盐缓冲介质（pH 3.0 - 4.5）中于620 nm处有最大吸收。该方法在铂浓度为0.3至2.6 μg mL⁻¹范围内符合比尔定律，摩尔吸光率和桑德尔灵敏度分别为5.1×10⁴ L mol⁻¹ cm⁻¹和0.0038 μg cm⁻²。已评估了最佳反应条件和其他分析参数。所开发的方法已成功应用于药物制剂、土壤、天然水、植物材料、含铂催化剂和合成合金样品中铂的测定。
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