摘要
在pH4.2~5.0酸性介质中,V(Ⅴ)与邻苯二酚紫和OP迅速生成蓝色三元配合物,配合物的组成为:n(钒):n(邻苯二酚紫):n(OP)=1:2:1,配合物的最大吸收波长为590nm,V在0.8~7.2μg/mL范围内符合比尔定律,摩尔吸光系数ε=2.1×10^5L·mol^-1·cm^-1。该体系可直接用于测定钒渣中V(Ⅴ)。
At pH 4.2 ~ 5.0 Vanadium can form a blue complex with catechol violet(PV) and OP, the composition of V( Ⅴ )/catechol violet (PV)/OP is 1:2: 1. The complex exhibits maximum absorption at 590 urn. Beer's law is obeyed in the range of 0.8 ~ 7.2μg/mL for V( V ) and the molar absorptivity is 2.1 × 10^5 L·mol·cm. The system may be applied to the determination of V(Ⅴ) in vanadium dregs with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2007年第7期95-96,共2页
Chinese Journal of Analysis Laboratory
关键词
V(Ⅴ)
邻苯二酚紫
分光光度法
钒渣
Vanadium
Catecholviolet(PV)
Spectrophotometry
Vanadium dregs