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本文基于在抗坏血酸存在下，痕量钒（Ⅴ）对溴酸钾氧化次甲基绿褪色的新指示反应，建立了一个催化动力学光度法测痕量钒（Ⅴ）的新方法。线性范围为０—０．１２μｇ／２５ｍＬ和０．１２—０．２０μｇ／２５ｍＬ，方法检出限为３．４×１０~（－１０）ｇ／ｍＬ。用于人发、水样中痕量钒（Ⅴ）的测定，结果满意。
In this paper, a new method for the determination of trace vanadium (Ⅴ) by catalytic kinetic spectrophotometry was established based on the new indication reaction of trace amounts of vanadium (Ⅴ) on the fading of methine green by potassium bromate in the presence of ascorbic acid. The linear range was 0-0.12μg / 25mL and 0.12-0.20μg / 25mL with the detection limit of 3.4 × 10 ~ (-10) g / mL. Used for the determination of trace vanadium (Ⅴ) in human hair and water samples with satisfactory results.