摘要
本文研究了铁(Ⅲ)在酸性介质中催化抗坏血酸(Vc或H2A)还原4-硝基-3’-甲基-氨基偶氮苯的褪色反应,拟定了反应的最佳条件,探讨了反应机理,建立了催化动力学测定痕量铁的新方法,该方法的检出限为2.98×10^(-11)g·mL-1,线性范围为0-200 ng·(25 mL)-1。比较了X射线能量色散谱法和催化光度法在玄武岩纤维样品中铁含量的测定,结果误差为2.89％。
The decolorizing reaction of 4-nitryl-3'-methyl-4'-amidoaobenzene and ascorbic acid catalyzed by iron(III) was investigated in acid. media and the optimum conditions were studied. The reaction mechanism was discussed and the new determination method of iron(III) was established by catalytic kinetics theory. The determination limit was 2.98 x 10(-11) g(.)mL(-1) and the linear range was 0-200 ng(.)(25 mL)(-1) Comparing methods of X-ray energy dispersion spectrometry and catalytic spectrometry, the determination error of iron(III) in basalt fibers was 2.89%.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2003年第5期1008-1011,共4页
Spectroscopy and Spectral Analysis
基金
国家科技部科技型中小企业技术创新基金(01C26211100422)资助
