摘要
研究了铁与二甲酚橙的显色反应。在2．0×10^-2mol／L的H2SO4介质中，以双氧水为氧化剂，铁（Ⅲ）与二甲酚橙可生成红褐色配合物，其表观摩尔吸光系数ε=1．4×10^4L／mol·cm，检出限为0．038μg／mL，线性范围为0～2．4μg／mL，平均回收率为96．5％，相对标准偏差RSD为2％。结果表明，利用铁二甲酚橙体系可不经分离等手段，直接对镀镍溶液中的铁进行分光光度分析，建立了水相测定镀镍溶液中铁（Ⅲ）的光度分析新方法。该法灵敏度、准确度高，测定过程迅速，简便，其它的常见成分无干扰。
The chromogenic reaction of iron and xylenol orange （XO） was studied. In medium of 2.0×10^-2mol/L sulphuric acid, Fe （Ⅲ） and XO can react and a henna coordination complex formed, while hydrogen peroxide is used as the oxidizer. The apparent molar absorptivity is 1.4×10^4L/mol·cm. The detecting limit is 0. 038 μg/mL. The liner range is 0-2.4μg/mL. The average efficiency of callback is 96.5%, and RSD is 2%. The results show that the system of Fe （Ⅲ） and XO can be used as a method for determining iron in nickel-plating solution by spectrophotometry, needn＇t through separation. It builds a new way to analyse Fe（Ⅲ） in nickel-plating solution. Moreover, no interference was found in the presence of some other common coexisting elements. The method was rapid, accurate and convenient.
出处
《电镀与精饰》
CAS
2006年第2期46-49,共4页
Plating & Finishing
关键词
二甲酚橙
镀镍液
铁(Ⅲ)
分光光度法
xylenol organe
nickel-plating solution
Fe（Ⅲ）
spectrophotometry
