新的间接分光光度法测定废水中氰化物——利用Ni~(2+)-5-Br-PADAP的显色反应(简报)

• 作 者: 沈乃葵 魏复盛 刘玉琴 尹方
• 机 构: 蚌埠医学院化学教研室,中国科技大学现代化学系,中国科技大学现代化学系,中国科技大学现代化学系
• 出 处: 蚌埠医学院学报
• 发表日期: 1982年03期
• 关键词: 氰化物 显色反应 Br-PADAP Ni 分光光度法测定 摩尔吸光系数 工业废水 络合态 简报 间接测定

本文首次报导在pH8(硼砂—盐酸缓冲溶液)的条件下,用CN-与Ni~(2+)的络合作用以抑制Ni~(2+)与5-Br-PADAP的显色反应间接测定氰(指氰化物,以CH-计).作者研究了此方法的适宜条件,结果认为提出的方法灵敏度较高(氰的摩尔吸光系数为3.1×10~4),选择性好.试剂稳定无毒,操作简便,易于掌握,重现性良好.工业废水中氰化物经吹气挥发分离,测得的氰为全部游离氰及部分络合态氰.氰的浓度介于0.5～15.0

This paper reports for the first time that the colorimetric reaction of Ni 2+ and 5-Br-PADAP is indirectly measured by the complexation of CN- and Ni 2+ at pH 8 (borax-hydrochloric acid buffer solution) Cyanide (cyanide, based on CH-). The authors studied the suitable conditions of this method, the results show that the proposed method has high sensitivity (molar extinction coefficient of 3.1 × 10 ~ 4), good selectivity. Toxic, easy to operate, easy to master, good reproducibility. Cyanide in industrial wastewater by blowing volatile separation, the measured total cyanide cyanogens and some cyanogen cyanogen concentration of cyanide between 0.5 ~ 15.0