【摘要】 在醋酸介质中,发现痕量砷(Ⅲ)能灵敏地催化高碘酸钾氧化靛红la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(Ⅲ)的方法。该法的线性范围0.0-40μg/LAs(Ⅲ),检测限为1.92×10-6g/L,用于环境水样中砷(Ⅲ)的测定,获得了满意的结果。更多还原

【Abstract】 In acetic acid medium,trace As（Ⅲ） can sensitively actyivate the indicating oxidative discoloration of indigo carmine la with KIO₄.The optimum condition and kinetic parameters are investigated and evaluated,a new method for determination of trace As（Ⅲ） is proposed.The detection limit is 1.82×10^-6 g/L and the linear range is 0.0-40 μg/mL As（Ⅲ）.It has been applied to the determination of trace As（Ⅲ） in environmental waters with satisfactory results.更多还原