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在硫酸介质中 ,痕量砷 ( )能灵敏地催化过氧化氢和高碘酸钾氧化二甲苯蓝FF褪色的指示反应 ,研究了该催化反应的最佳条件与动力学参数 ,建立了一种新的测定痕量砷 ( )的方法。该法的线性范围 0～ 4.0 μg/ L As( ) ,检出限为 9.8× 1 0 - 8g/ L,用于食品中砷 ( )的测定 ,结果满意
In a sulfuric acid medium, traces of arsenic (Ⅲ) can sensitively catalyze the indicated reaction of hydrogen peroxide and potassium periodate oxidation xylene blue FF fading, studied the optimum conditions and kinetic parameters of the catalytic reaction, established a A new method for the determination of trace arsenic (). The method has a linear range of 0 ~ 4.0 μg / L As () with a detection limit of 9.8 × 10 ~ 8 g / L, which is suitable for the determination of arsenic in food