离子选择电极法测定氟在尾矿中的应用

摘要

This article mainly elaborated by ion selective electrode method[1] determination of fluorine in cig-arette.Sample decomposition with sodium hydroxide molten melt water leaching,filtering,so that the flu-orine [2] and iron,copper,lead,separation,and then in pH6.5 ~7 sodium citrate triethanol amine medi-um,using a saturated calomel electrode as reference electrode,fluoride ion selective electrode as indicator electrode,electrode potential determination fluorine,the recoveries of 101%~105%,suitable for the de-termination of fluorine containing ash.%本文主要阐述用离子选择电极法[1]测定尾矿中的氟。试料以氢氧化钠熔融分解，用水浸出熔融物后过滤，使氟[2]与硅、铁、铜、铅等分离，然后在 pH6．5～7．0的柠檬酸钠－三乙醇胺介质中，以饱和甘汞电极为参比电极，氟离子选择电极为指示电极，用电极电位仪测定氟，加标回收率101％～105％，适用于尾矿中氟的测定。