摘要
研究了在pH =5 5的弱酸性介质中 ,利用Fe(Ⅲ ) ,Mo(Ⅵ )对H2 O2 氧化邻氨基酚催化反应速率不同 ,用萃取平衡控制反应时间和水相中邻氨基酚的浓度及催化反应进行的程度 ,通过测量 4 2 4nm下有机相的吸光度 ,建立了萃取催化光度法同时测定铁和钼的新方法。同时测定铁和钼的线性范围分别为 0 0 10～ 0 0 30 μg·mL- 1 和 0 5 0～ 2 0 μg·mL- 1 。用于大豆中铁和钼的测定 ,结果满意。
In this paper , a new extraction catalytic spectrophotometric method for the simultaneous determination of iron and molybdenum has been studied The method is based on the difference of the reaction rate of iron(Ⅲ) and molybdenum(Ⅵ) catalyzed oxidation of o aminophenol by hydrogen peroxide in weak acidic medium at pH 5 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 424 nm The linear ranges of the method are 0 010-0 30 μg·mL -1 (for iron) and 0 50-2 0 μg·mL -1 (for molybdenum) The method has been applied to the simultaneous determination of iron and molybdenum in soybean with satisfactory results
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第6期1072-1074,共3页
Spectroscopy and Spectral Analysis
基金
安徽省高校自然科学基金资助课题 (99JL0 1 80
2 0 0 1KJ1 96)
关键词
同时测定
萃取催化光度法
铁
钼
邻氨基酚
大豆
Simultaneous determination
Extraction catalytic spectrophotometry
Iron
Molybdenum
o aminophenol
