【摘要】 研究了在稀磷酸介质中,痕量碘离子对亚硝酸根催化溴酸钾氧化亚甲蓝的阻抑作用,建立了测定痕量碘离子的阻抑动力学光度分析新方法。测定碘离子的线性范围为0 040～0 48μg/mL,检出限为1 7×10-8g/mL。用于测定盐中的微量碘,结果满意。更多还原

【Abstract】 A simple and sensitive kinetic spetrophotometric method for determination of trace iodine has been developed.The method is based on the inhibition effect of iodine on the fading reaction in which nitrite catalyzes potassium bromate to oxidize methylene blue in dilute phosphoric acid medium.The linear range of determination is 0.040-0.48 μg/mL.The detection limit is 1.7×10^-8 g/mL.The method has been used for the determination of trace iodine in salt sample with satisfactory results.更多还原