催化动力学光度法测定痕量钒(Ⅴ)的研究

Study on the Catalytic kinetic Photometric Determination of Trace Vanadium(Ⅴ)

研究了在ｐＨ９．２的硼砂介质中，痕量钒（Ⅴ）催化Ｈ２Ｏ２氧化桑色素褪色反应体系的新催化光度法。测量范围为０～７．５μｇ／５０ｍＬ加标回收率为９５％～９８．５％，测定２μｇ钒（Ⅴ），ＲＳＤ为１．６８％，用于水样中痕量钒（Ⅴ）的测定。

n this paper a new method for the catalytic photometric determination of trace vanadium (Ⅴ) is introduced.The method is based on trace vanadium(Ⅴ) catalyzing the oxidation of morin by hydrogen peroxide in borax medium of pH 9.2 .The method has good selectivity and precision( n =6,RSD=1.68,at a leve of 2μg vanadium(Ⅴ)).It has been used to determine trace vanadium(Ⅴ) in waters with satisfactory results.