催化动力学光度法测定土壤中痕量钒(Ⅴ)  

CATALYTIC SPECTROPHOTOMETRIC DETERMINATION OF TRACE VANADIUM (Ⅴ)

作　　者：陈思钦[1] 曾希建 傅毅华 

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）》1990年第1期84-88,共5页

摘　　要：本文研究了新的指示反应——钒(V)催化氯酸钾氧化邻苯二胺与磺基水杨酸有显色反应,确定了测定超痕量钒(V)的适宜条件。在450nm处测定显色产物的吸光值,灵敏度按表观摩尔吸光系数ε为3.6×10~7L·mol^(-1)·cm^(-1),测定钒量的范围为0.02～1.5ng/mL。应用于土壤及水样中痕量钒的测定。A new catalytic spectrophotometric method, suitable for determiningultratrace (V)existed in soil, water and other substances, when mixed redu-ctant of sulfosalicylic acid and o--phenylendediamine was oxidized bypotassium chlorate using V(V) as catalyst to produce colour indicating re-action, had been established. Its maximun absorption was at 450nm molarabsorptivity was 3.6×10~7 L·moL^(-1)·cm^(-1). The range of determination was0.02～1.5ng/mL. This method was simple, quick and without any interferenceof cations and anions.

关 键 词：土壤化学分析 痕量钒 光度法 测定 

分 类 号：S151.93[农业科学—土壤学]