催化动力学光度法测定痕量硒(Ⅳ)  

CATALYTIC SPECTROPHOTOMETRIC DETERMINATION OF TRACE SELENIUM (Ⅳ)

作　　者：陈思钦[1] 傅毅华 曾希建 

机构地区：[1]江西大学化学系

出　　处：《江西大学学报（自然科学版）》1989年第3期37-40,共4页

摘　　要：本文研究了盐酸苯肼α—萘胺作为混合还原剂,硒(Ⅳ)催化氯酸钾氧化显色的新指示反应,建立了测定痕量硒的新方法。它的最大吸收波长为536nm,灵敏度ε=2.53×10~6,测定范围为0—0.75μg/25ml并具有选择性强、操作简单、分析结果准确的特点,适用于人体头发,矿样和水样中痕量硒(Ⅳ)的测定。A new catalytic spectrophotometric method,suitable for determining altratrace Se (Ⅳ)existed in soil, water and other substances, when mixed reductant of phenylhydrazine and α- naphthylamine is oxidized by potassium chlorate using Se (Ⅳ)as catalyst to produce colour indicating reaetion, has been established. Its maximum absorption is at 536 am,molar absorptivity is 2.53x10^61. tool^(-1). cm^(-1)and range of determination is 0-30ng/ml. The advantages of this methed are simple and quick.

关 键 词：硒 测定 催化反应 盐酸苯肼 2-萘胺 

分 类 号：O613.52[理学—无机化学]