摘要
研究了在 p H5 .5的 Na Ac- HAc介质中 ,铁 ( )、钒 ( )催化溴酸钾氧化邻氨基酚显色的指示反应 ,用萃取平衡控制反应时间和水相中邻氨基酚的浓度及反应程度 ,通过测量 41 8nm处有机相的吸光度 ,建立了萃取催化动力学光度法同时测定痕量铁 ( )、钒 ( )的新方法。测定铁 ( )、钒 ( )的线性范围分别为 0 .0 5 - 2 0 μg/L和 0 - 1 0 0 μg/L;检出限分别为 3.2× 1 0 - 7g/L和 1 .3× 1 0 - 6g/L。用于测定环境水样及废水中的铁 ( )、钒 ( ) ,结果与 AAS法相符。
A new extraction catalytic kinetic spectrophotometric method used for the simultaneous determination of trace iron(Ⅲ) and vanadium(Ⅴ) has been described.It is based on the iron(Ⅲ) and vanadium(Ⅴ) catalyzed oxidation of o aminophenol by potassium bromate in HAc NaAc buffer medium at pH5.5.The reaction time,concentration of o aminophenol in aqueous phase and degree of reaction are controlled by extraction equilibrium.The absorbance of organic phase is measured at 418nm.The linear range of the method is 0.05—20μg/L for Fe(Ⅲ) and 0—0.1mg/L for V(Ⅴ),the detection limit for Fe(Ⅲ) is 3.2×10 -7 g/L and for V(Ⅴ) is 1.3×10 -6 g/L.The method has been applied to the determination of Fe(Ⅲ) and V(Ⅴ) in natural water and waste water,and the results obtained are well in agreement with AAS method.
出处
《光谱实验室》
CAS
CSCD
2000年第2期153-156,共4页
Chinese Journal of Spectroscopy Laboratory
关键词
萃取
催化光度法
邻氨基酚
铁
钒
环境水样
废水
Extraction,Catalytic Spectrophotometry, o Aminophenol, Iron(Ⅲ),Vanadium(Ⅴ).