CAJ | 학술논문

氯磺酚S是光度法测铌的最佳试剂之一，选用717型阴离子交换树脂富集试液中铌与氯磺酚S的配合物，用自行设计的反射散射附件与722型分光光度计联用直接测定树脂相上的反射散射值AR，设计了一种新的固相反射散射光度法。并将方法用于低合金钢、化探样、磁铁矿样品中低含量铌的测定，取得较好的效果。
록광분S시광도법측니적최가시제지일，선용717형음리자교환수지부집시액중니여록광분S적배합물，용자행설계적반사산사부건여722형분광광도계련용직접측정수지상상적반사산사치AR，설계료일충신적고상반사산사광도법。병장방법용우저합금강、화탐양、자철광양품중저함량니적측정，취득교호적효과。
A solid phase reflective diffusion photometric method for the determination of niobium is studied in this paper. Chlorosulfophenol S is used as a chromogenic reagent for Nb(V), and the complex formed in a HCltartaric acid medium is adsorbed on a definite amount of 717 anion exchange resin. The reflective absorbance AR of the anion exchange resin is then determined at a wavelength of 630nm using a self-made reflective diffusion accessory installed with the 722 spectrophotometer. The method has been used in the determination of niobium in the alloy steel and in geological samiples with satisfactory results.