化学发光法测定I-的研究

Study on Chemiluminesence Method for Determinating of Iodine

中文关键词:  化学发光分析  甲醛  微量碘  高锰酸钾

英文关键词:chemiluminescence analysis  formaldehyde  trace iodine  potassium permanganate

中文摘要:

      研究了高锰酸钾-I^--甲醛体系化学发光,从而建立了一种测定微量I^-的新方法.讨论了各种反应物浓度、酸度、干扰离子等因素对测定结果的影响.I^-浓度在1.0×10^-6～4.0×10^-5g/mL范围内与化学发光强度有较好的线性关系.对1.0×10^-5g/mL的I^-进行了11次平行测定,相对标准偏差为2.8%,方法的检出限为2.4×10^-8g/mL.结果令人满意.

英文摘要:

      Chemiluminesence reaction of potassium permanganate I^- formaldehyde system was investigated, and a new method for determination of micro amounts of iodine was developed. The effects of factors e.g consistency of various reaction mass, acidity, disturbing ions, etc. on the analytical results were studied. Under optimal condition, the linear range for the determination of I^- was 1.0×10^-6 ～4.0×10^-5 g/mL and the detection limit was 2.4×10^-8 g/mL, the relative standard deviation for the determination of 1.0×10^-5 g/mL I^- (n=11) was 2.8%.