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在H3PO4介质中,抗坏血酸存在下,超痕量钒能灵敏地催化KBrO3氧化甲基绿褪色。研究了该催化褪色反应的最佳条件及动力学参数,建立了一种测定超痕量钒的新方法。该法的线性范围为0~1.00 ng/mL,检出限为5.20×10-12g/mL。方法可用于芹菜和小麦中钒的测定。
In H3PO4 media, ultra trace trace vanadium can catalyze the KBrO3 oxidation of methyl green fading sensitively in the presence of ascorbic acid. The optimum conditions and kinetic parameters of the catalytic fading reaction were studied, and a new method for the determination of ultra-trace vanadium was established. The linear range of this method is 0 ~ 1.00 ng / mL with the detection limit of 5.20 × 10-12 g / mL. The method can be used for the determination of vanadium in celery and wheat.