Jayachandran J, Dhadke P M
Inorganic Chemistry Laboratory, Department of Chemical Technology, University of Bombay, Matunga, Mumbai 400 019, India.
Talanta. 1997 Jul;44(7):1285-90. doi: 10.1016/s0039-9140(97)02190-5.
Liquid-liquid extraction separation of iron(III) with 2-ethyl hexyl phosphonic acid mono 2-ethyl hexyl ester (PC-88A) in toluene has been studied. Quantitative extraction of iron(III) with 5 x 10(-3) M PC-88A in toluene is observed in the pH range 0.75-2.5. From the extracted complex species in the organic phase iron(III) was stripped with 1-4 M HNO(3), 1.5-4 M H(2)SO(4) and 1.5-4 M HCl, and later determined spectrophotometrically by thiocyanate method. Separation of iron(III) was carried out with some of the first transition metals in binary and multicomponent mixtures. This method was extended for the determination of iron in real samples.
研究了在甲苯中用2-乙基己基膦酸单2-乙基己酯（PC-88A）液-液萃取分离铁（III）的方法。在pH值为0.75 - 2.5的范围内，观察到用5×10⁻³ M PC-88A的甲苯溶液可定量萃取铁（III）。从有机相中萃取的络合物中，用1 - 4 M硝酸、1.5 - 4 M硫酸和1.5 - 4 M盐酸反萃取铁（III），然后用硫氰酸盐法进行分光光度测定。在二元和多组分混合物中，用该方法对铁（III）与一些第一过渡金属进行了分离。该方法被扩展用于实际样品中铁的测定。
