摘要
根据Mo(Ⅵ)对H_2O_2氧化KI具有催化作用的原理,以淀粉为显色剂,建立了测定痕量钼的流动注射光度法。进样频率110次/h,线性范围0～0.4ppm,检出限3.2ppb。实际测定了土壤、粮食、人发中钼的含量,回收率为91％～108％。
A catalytic spectrophotometric method for determination of trace molybdenum by flow injection analysis has been established, based on the catalytic oxidation of potassium iodide by hydrogen peroxide in the presence of molybedenum (VI) and the iodine produced is coloured with starch. The linear range and detection limit for molybdenum (VI) were 0 to 0.4 ppm and 3.2 ppb. The method has been successfully applied to determine molybdenum in the grain, soil and hair.
出处
《营养学报》
CAS
CSCD
北大核心
1991年第1期68-73,共6页
Acta Nutrimenta Sinica
关键词
钼
流动注射分析
催化光度法
molybdenum flow injection analysis catalytic spectrophotometry
