【摘要】 研究了在磷酸介质中柠檬酸存在下痕量Ｖ（Ⅴ） 催化溴酸钾氧化对氯偶氮氯膦的反应及反应的动力学条件， 建立了催化动力学光度法测定痕量Ｖ（Ⅴ）的新方法， 该方法的检出限为４－７３×１０－１１ ｇ／ｍｌ， 线性范围为０－００１ ～１０ μｇ／２５ ｍｌ。将该体系用于巯基葡聚糖凝胶（ＳＤＧ） 分离后测定痕量Ｖ（ Ⅴ） ， 方法的选择性、灵敏度都很高。用于样品中痕量Ｖ（ Ⅴ） 测定，结果令人满意。更多还原

【Abstract】 Abstract: Trace V(Ⅴ) catalyzes the reaction of chlorophosphonazo PC citric acid and potassium bromate in phosphoric medium. The kinetics conditions was studied. A kinetic spectrophotometry method for the determination of trace V(Ⅴ) was established. The detection limit of the method is V(Ⅴ) 4.73×10 -11 g/ml. The measurement is in the range of 0.001～1.0 μg/25 ml for V(Ⅴ). The common metal ions can be separated by mercapto containing dextran gel. The method was used to determine trace V(Ⅴ) in samples with satisfactory results.更多还原