摘要
基于稀硫酸介质中 ,痕量Fe(Ⅲ )对过氧化氢氧化靛红的反应有强烈的催化作用 ,建立了催化光度法测定痕量铁的新方法。该法的检出限为 8.8× 10 - 7g·L- 1,线性范围为 0～ 2 μg/2 5mlFe(Ⅲ )。方法简便、快速、灵敏度高 ,应用于井水及自来水中痕量铁的测定 。
It is found that in a dilute H 2SO 4 medium, the oxidation of indigo carmine by hydrogen peroxide is catalyzed by trace amounts of iron(Ⅲ). Based on this phenomenon, a sensitive method for the determination of traces of iron is reported. The detection limit of this method is found to be 8.8×10 -7 g·L -1 . A linear relationship between the decrease in absorbance and the rate of reaction lg( A 0/A ) is found in the concentration range of 0～2μg of Fe(Ⅲ) per 25ml of solution. The proposed method has been used in the analysis of tap water and well water.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2001年第7期301-302,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
