锌烟尘中氟、氯的测定

Determination of Fluorine, Chlorine, and Zinc Dust

采用在硫酸溶液中,有二氧化硅、高锰酸钾存在下,锌烟尘中的氟以硅氟酸的形式被蒸馏逸出,用氢氧化钠溶液吸收,经硝酸调节酸度,用柠檬酸铵调节离子强度,采用离子计测定氟含量.根据锌烟尘中化学成分的特点,采用硝酸(1+1)超声分解样品,使锌烟尘中的氯解离出来,然后在酸性条件下,用自动电位滴定仪滴定氯.离子计测定氟简单快速,灵敏度高;试验酸性条件下超声波分解样品,具有独创性.这两种方法测定云锡顶吹炉产出锌烟尘中的氟、氯含量,结果准确度较高,操作简便易行.

With the sulfuric acid solution, silica, potassium permanganate is distilled from the presence, form the zinc dust fuoride with fluosilicic acid, absorption by sodium hydroxide solution, the nitric acid acidity adjustment, adjust the ionic strength using ammonium citrate, fluorine content meter by ion. According to the characteristics of chemical composition of the zinc dust, using nitric acid （1＋1） ultrasonic decomposition of sample, the dissociation of chlorine in zinc dust, and then in the acidic conditions, by automatic potentiometric titration titration chloride . Determination of fluorine ion gauge is simple and rapid, high sensitivity; ultrasonic testing sample is decomposed under acidic conditions, with originality.Determination of fluorine, chlorine content of Yunnan Tin top blown furnace zinc output in the two methods, the results of high accuracy, easy operation.