摘要
四价硒可以氧化广为和结晶紫形成离子缔合物，在５４６ｎｍ波长处该离子缔合物摩尔吸光系数可达１．３×１０５。本体系在磷酸介质中可避免Ｆｅ３＋的干扰。本方法用于水中硒的直接测定。
An ion-association complex of I3 with crystal violet hased on Se (Ⅳ) oxidation of I-to I3 in acidmedium is formed. Its maximun aborption has been at 546 um with molsr aborptirity being 1. 3×105 L. mol-1.cm-1. With the use of phosphosic acid medium, the method eliminates niterference with Fe3+ and can be used to determine Se(Ⅳ) in environmental water samples.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1995年第2期112-115,共4页
Journal of Nanjing Agricultural University
关键词
硒
结晶紫
碘化钾
分光光度法
水
selenium
crystal violet
ion-association complex
