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本文提出一种双络合体系K-系数分光光度法同时测定Mo(Ⅵ)与W(Ⅵ)的新方法.它是 基于酒石酸钾钠对Mo(Ⅵ)和W(Ⅵ)这两种离子与苯芴酮-CPC在0.3mol·L-1盐酸溶液中形成络 合物的限制能力的差异,通过测量存在和不存在酒石酸钾钠的这二种显色体系在510nm处的吸光 度和所计算的K-系数消除Mo(Ⅵ)与W(Ⅵ)彼此间的干扰.本文已被用于钢铁中钼与钨的测定, 获得满意结果.
In this paper, a new method for the simultaneous determination of Mo (Ⅵ) and W (Ⅵ) by double complex system K-factor spectrophotometry is proposed. It is based on the difference in the ability of potassium sodium tartrate to limit the formation of complexes of Mo (Ⅵ) and W (Ⅵ) with benzofluorenone-CPC in 0.3 mol·L -1 hydrochloric acid solution. By measuring the presence of The absorbance at 510 nm and the calculated K-factor of these two chromogenic systems in the absence of potassium sodium tartrate counteract the interference of Mo (VI) with W (VI) with each other. This article has been used in the determination of molybdenum and tungsten in steel to obtain satisfactory results.