溴酸钾氧化酸性铬兰K催化光度法测定香菇中铁含量

Catalytic Spectrophotometric Determination of Iron Content in Lentinus Edodes by Potassium Bromate Oxidation Acid Chromium Blue K

在硫酸介质中,铁对溴酸钾氧化酸性铬兰K反应有较强的催化作用。据此,本文对实验条件进行优化,测定香菇中铁的含量。试验结果表明,Fe(Ⅲ)质量浓度在0.008~0.048μg/mL范围内与吸光度差?A呈良好的线性关系,其线性回归方程为y=3.0357x+0.002,相关系数R^2=0.998 2,检出限为7.39×10^(-4)μg/mL,样品加标回收率为92.5%~99.4%,操作方法简单。

In sulfuric acid acid chromium blue k reaction medium, Iron has a strong catalytic effect on potassium bromate oxidation and the experimental conditions were optimized to determine the iron content in lentinus edodes. The results showed that Fe （ Ⅲ ） mass concentration has a good linear relationship with the absorbance difference A A in 0.008 --0.048 μg/mL range, and its linear regression equation is y=3.035 7x ＋0.002, correlation coefficient R2=0.998 2, and the detection limit is 7.39 × 10^-4 μg/mL, the recovery rate of the sample is 92.5% - 99.4%, the operation method is simple.