摘要
本文研究了钒(Ⅳ)-偶氮氯膦Ⅲ-溴化十六烷基三甲铵-乳化剂OP体系的光度特性,并确定了钒测定的最佳条件.配合物的最大吸收位于620nm,单、双波长法测得其表观摩尔吸光系数分别为2.29×10~4和3.12×14~4L.mol^(-1)·cm^(-1),该体系的灵敏度,选择性和稳定性均较相应的二元体系高.据此提出了测定钒的新方法,用于低合金钢中钒的测定,结果满意.
The photometric character of the system for vanadium (Ⅳ)-chlorophosph-onazo Ⅲ-CTMAB-emulsifier OP has been studied. The optimum conditions have been investigated for determination of vanadium. The absorption maximun of the complex is at 620 nm with apparent molar absorptivities 2.29×104 and 3.12 ×104 L. mol. -1cm-1 by single- and dualwavelength methods respectively. The system is of higher sensitivity, selectivity and stability than binary system without CTMAB and emulsifier OP. The new method for determining vanadium is proposed and has been applied to the determination of vanadium in low alloyed steel with satisfactory results.
关键词
钒
偶氮氯膦Ⅲ
表面活性剂
测定
Vanadium
Chlorophosphonazo Ⅲ
Surfactant
Colour system
