以酸性铬蓝K为显色剂,双峰双波长光度法测定微量铁(Ⅲ)  

Dual Peak-Dual Wavelength Spectrophotometric Determination of Trace Iron(Ⅲ)With Acid Chrome Blue K as Chromogenic Reagent

作　　者：万能勇 黄选忠[2] 

机构地区：[1]湖北兴山县南阳镇卫生院,湖北兴山443713 [2]湖北省兴山县疾病预防控制中心,湖北兴山443711

出　　处：《山东化工》2015年第9期101-102,共2页Shandong Chemical Industry

摘　　要：在弱酸性介质中,Fe3＋与酸性铬蓝K形成黄色配合物,该配合物在440nm和550nm波长处具有正、负吸收峰,且其吸光度△A与Fe^3＋含量在0~1.4 mg/L范围内呈良好的线性关系。建立了一种以酸性铬蓝K为显色剂,双峰双波长光度法测定微量Fe^3＋的新方法,该方法应用于水中微量Fe^3＋的测定,结果令人满意。In a weakly acidic medium, the colour reaction of iron（Ⅲ） with acid chrome blue K to a stable Yellow complex. The coordination complex showed one positive absorption peak at wavelength of 440nm and one negative absorption peak at wavelength of 550nm in its absorption spectrum, a new dual peak - dual wavelength spectrophotometric method for the determination of trace iron（ Ⅲ ） with acid chrome blue K as chromogenic reagent was established. Beer＇s law is obeyed for iron（ Ⅲ） in the range of 0 - 1.4 mg/L. The method has been used to determine trace iron（ Ⅲ） in water with satffactory results.

关 键 词：酸性铬蓝K 双峰双波长光度法 Fe(Ⅲ) 

分 类 号：O657.3[理学—分析化学]