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 .
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 %.
出处
《分析测试技术与仪器》
CAS
2002年第1期23-25,共3页
Analysis and Testing Technology and Instruments
关键词
测定
化学发光分析
甲醛
碘
高锰酸钾
食品
chemiluminescence analysis
formaldehyde
trace iodine
potassium permanganate
