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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’-chlorobiphenyl can be used as a precipitant for tungsten (VI). The acidity of the solution suitable for precipitation is pH 1.5-3.1. Should be precipitated at room temperature, followed by the nearly boiling temperature standing. Precipitant dosage should be 1.25 times the theoretical value. Determination of 4-75 mg of tungsten trioxide can be satisfactory results. According to pyrolysis curve precipitation can only be burned tungsten oxide and weighed. Burning temperature of 625 - 850 °. The article still reports the number of alkali metal salts. The 4-amino-4’-chlorobiphenyl molybdates can also be quantitatively precipitated at pH 1.8-2.8 with higher solubility than the corresponding tungstates. However, it is promising as a precipitant for molybdenum (VI).