摘要
在pH≈10的氨-氯化铵缓冲溶液中Fe^(3+)与络黑T(EBT)形成1:3的暗红色配合物.其最大吸收波长在488nm处,ε值约为2.3×10~4,线性范围为0～30μg/25ml.方法可用于工业盐酸、硅酸盐水泥等样品中铁含量的测定,其结果与火焰原子吸收法(FAAS)较好吻合.
It is found that Fe( Ⅲ ) reacts with EBT in an ammonical buffer solution of pH?0 to form a dark red complex with its absorption maxima at 488nm and a molar absorptivity of 2. 3 ×10~1L ·mol^(-1)·cm^(-1). Beer's law holds over the concentration range of 0~30μg of iron( I ) per 25ml. The mole ratio of the complex is found to be 1 ' 3 (M : R). The method can be used for the determination of iron in hydrochloric acid (industrial use), silicates, and cement. The results obtained check very well with that obtained by AAS method.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1999年第7期311-312,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
