摘要
研究了在稀硫酸介质中,铁(Ⅲ)催化H2O2氧化溴甲酚紫的褪色反应,建立了一种高灵敏的测定微量铁的新方法。该方法线性范围为0.05～0.6μg铁(Ⅲ)/25ml,摩尔吸收系数为8.36×105L/mol·cm。此方法用于味精中微量铁的测定,结果令人满意。
A new method has been developed for determination of trace iron, based on the discoloration of bromcresol purple by hydrogen peroxide in H2SO4 solution under the catalysis of iron（Ⅲ）. The linear range of the method is 0.05 -0.611 g iron（Ⅲ）/ 25 ml, and the apparent molar absorptivity is 8.36 × 10^5L/mol · cm. The method has been applied to determine trace iron（Ⅲ） in monosodium glutamate with satisfactory results.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2007年第9期490-493,共4页
Food Science
基金
河南省重点科技攻关项目(072102110007)
关键词
催化光度法
铁
过氧化氢
溴甲酚紫
catalytic spectrophotometric
iron
bromcresol purple
hydrogen peroxide
