氮气浮选Co(Ⅱ)-SCN^--MG^+三元体系光度法测定VB_(12)中钴的研究  

Determination of Cobalt in VB_(12) with Flotation System of Co(Ⅱ)-SCN^--MG^+ Spectrophotometric Method by N_2

作　　者：周丰群[1] 

机构地区：[1]平顶山师范高等专科学校物理系,河南省平顶山市467000

出　　处：《光谱实验室》2001年第3期350-352,共3页Chinese Journal of Spectroscopy Laboratory

基　　金：河南省自然科学基金资助课题

摘　　要：在酸性条件下 ,N2 可将钴 -硫氰酸铵 -孔雀石绿三元体系浮选于甲苯中 ,利用这一特性本文建立了浮选测钴新光度法。本法灵敏度高 ( ε=1.80× 10 5L·mol-1· cm-1) ,选择性强 ,除 Cu2 +、Zn2 +外其余共存离子基本无干扰 ,精密度可靠 ( RSD=1.89% ) ,测定药品 VB12 中钴的含量 。A new method for determination cobalt with system of cobalt NH 4SCN malachite green(MG) flotation in toluene by N 2 in acidic medium was developed.This method has high sensitivity( ε =1.80×10 5L·mol -1 ·cm -1 ) and selectivity.The coexisting ions doesn't affect the determination except for Cu 2+ and Zn 2+ .Its accuracy is reliable(5μg cobalt was measured for 6 times,RSD=1.89%).The method was used to determine cobalt in medicine VB 12 with satisfactory results.

关 键 词：钴 分光光度法 氮气浮选 孔雀石绿 药物分析 维生素B12 测定 硫氰酸铵 

分 类 号：R977.22[医药卫生—药品] R917[医药卫生—药学]