化学学报 ›› 1958, Vol. 24 ›› Issue (1): 117-121. 上一篇    

论文

钼及钨之测定——Ⅺ. 以4-氨基-4’-氯联苯作沉淀剂

梁树權, 王顺荣   

  1. 中国科学院化学研究所 北京
  • 投稿日期:1957-09-19 发布日期:2013-06-03

THE DETERMINATION OF MOLYBDENUM AND TUNGSTEN Ⅺ. 4-AMINO-4’-CHLORODIPHENYL AS PRECIPITANT

LIANG SHU-CHUAN, WANG SHUN-JUNG   

  1. Institute of Chemistry, Academia Sinica, Peking
  • Received:1957-09-19 Published:2013-06-03

4-氨基-4'-氯联苯可以用作钨(Ⅵ)的沉淀剂.适宜於沉淀的溶液酸度为pH 1.5—3.1.应在室温沉淀, 继在近沸温度静置.沉淀剂用量应为理论值1.25倍.测定过4—75毫克三氧化钨均能得满意的结果.根据热解曲线沉淀只能灼烧为三氧化钨而称重.灼炼温度为625-850°.文中尚报告数称碱金属盐的影响.4-氨基-4'-氯联苯之钼酸盐在pH1.8--2.8时亦能定量沉淀, 其溶解度较相应的钨酸盐为高.但有希望用作钼(Ⅵ)之沉淀剂.

4-Amino-4'-chlorodiphenyl, a related compound of benzidine, is used as a reagent for sulfate determination, hence it is interesting to study whether this reagent can be used as a precipitant in tungsten(Ⅵ) and molybdenum(Ⅵ) determinations.It is found in the present investigation that the reagent may be used as a precipitant for tungsten(Ⅵ) and is promising for molybdenum(Ⅵ) determinations.