示波极谱法测定环境和生物样中痕量碘  

Determination of trace amounts of iodine in environmental and biological materials with osillopolarography

作　　者：徐泽民[1] 李平[2] 朱岚[2] 

机构地区：[1]四川大学化学学院,四川成都610064 [2]四川省地方病防治研究所,四川成都610031

出　　处：《化学研究与应用》2002年第6期732-733,共2页Chemical Research and Application

摘　　要：The paper reported a analytical method for determining the trace iodine in environmental and biological materials.After mixed with the ashing aids KOH/KClO 3 and dried thoroughly,the samples were ashed in muffle furnace at 600℃.Then the residues were dissolved with water.By means of mixed oxidants KMnO 4/NaOCl,iodide was transformed into iodate and excessive oxidants were reduced with the solution of sodium sulfite.In medium of 0 2 mol/L KNO 3-0 1 mol/L KCl iodate was determined with osillopolarography.The peak potential lay at -1 25V(vs.SCE).The concentration of iodide related to the secondary differential of the peak currents ranged from 0 001 to 10mg/L with a good linear relation.The polarographical behaviors of iodate were studied.The method had been applied to determine trace iodine in well,salt,urine,human hair and maize with satisfactory results.The paper reported a analytical method for determining the trace iodine in environmental and biological materials.After mixed with the ashing aids KOH/KClO 3 and dried thoroughly,the samples were ashed in muffle furnace at 600℃.Then the residues were dissolved with water.By means of mixed oxidants KMnO 4/NaOCl,iodide was transformed into iodate and excessive oxidants were reduced with the solution of sodium sulfite.In medium of 0 2 mol/L KNO 3-0 1 mol/L KCl iodate was determined with osillopolarography.The peak potential lay at -1 25V(vs.SCE).The concentration of iodide related to the secondary differential of the peak currents ranged from 0 001 to 10mg/L with a good linear relation.The polarographical behaviors of iodate were studied.The method had been applied to determine trace iodine in well,salt,urine,human hair and maize with satisfactory results.

关 键 词：示波极谱法 测定 碘 生物样品 环境样品 痕量分析 

分 类 号：O613.44[理学—无机化学] O657[理学—化学]