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流动注射催化动力学光度法测定碘离子 被引量:5

Study on determination of iodide by flow-injection catalytic kinetic spectrophotometry
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摘要 Based on catalysis of I-on the decolor reaction between potassium bromate and indigo carmine in the acid medium,and combined with flow injection analysis,a new flow-injection catalytic kinetic spectrophotometric method was found for determination of iodide in sample.The experimental results show that the determination is carried out at temperature of 80℃ and the concentration of H2SO4,KBrO3,and indigo carmine is 1.2 mol/L,1.8×10-2 mol/L and 1.0×10-4 mol/L respectively,the linear range for the method is 0.50~1.8 mg/L.The detection limit is 0.0022 mg/L.The relative standard deviation is 1.92%.The proposed method was applied to the determination of iodide in troche successfully.The recovery was between 99.2% and 103.6%. Based on catalysis of I-on the decolor reaction between potassium bromate and indigo carmine in the acid medium, and combined with flow injection analysis, a new flow-injection catalytic kinetic spectrophotometric method was found for determination of iodide in sample. The experimental results show that the determination is carried out at temperature of 80℃ and the concentration of H2SO4 , KBrO3 ,and indigo carmine is 1.2 mol/L, 1.8 × 10.2 mol/L and 1.0 ×10^4 mol/L respectively, the linear range for the method is 0.50 - 1.8 mg/L. The detection limit is 0. 0022 mg/L. The relative standard deviation is 1.92%. The proposed method was applied to the determination of iodide in troche successfully. The reeovery was between 99.2% and 103.6%.
出处 《化学研究与应用》 CAS CSCD 北大核心 2010年第1期87-90,共4页 Chemical Research and Application
基金 国家"863"项目(2006AA09Z173)资助
关键词 流动注射 催化 靛蓝胭脂红 碘离子 flow-injection catalysis indigo carmine iodide
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