论文部分内容阅读
本文研究了在磷酸存在下钨与邻苯二酚紫和氯代十六烷基吡啶的反应,确定了络合物的显色条件。三元络合物最大吸收波长为690nm,络合比为W:PV:CPC=1:1:2,摩尔吸光系数是3.82·10~4,WO_3量在25μg—150μg/25ml范围内服从比耳定律,钼(VI)、铬(Vl)、锡(lV)、锑(V)、钒(V)干扰钨的测定,可以加入盐酸肼—EDTA消除干扰,方法能测定0.5—××％范围内的三氧化钨,已用于矿物岩石中钨的测定。
In this paper, the reaction of tungsten with catechol violet and cetylpyridinium chloride in the presence of phosphoric acid was studied and the conditions for the color development of the complex were established. The maximum absorption wavelength of the ternary complex is 690nm, the complex ratio is W: PV: CPC = 1: 1: 2, the molar extinction coefficient is 3.82 · 10 ~ 4, WO_3 is in the range of 25μg-150μg / The determination of tungsten by interfering with tungsten, molybdenum (VI), chromium (Vl), tin (V), antimony (V) and vanadium (V) can be done by adding hydrazine hydrochloride-EDTA to eliminate the interference. Tungsten trioxide has been used for the determination of tungsten in mineral rock.