本文提出了一种新的单管热解法,它是以内衬一小段石英管的普通瓷管作反应管。热解时通入氧气携带水蒸汽.样品中添加混合氧化物作催化剂,使热解温度降至1050℃。用氢氧化钠溶液吸收热解出的氯化物,用离子选择电极法测定了炉渣及保护渣中的氟,回收率为100±1%,标准偏差<0.06。 This paper presents a new single-tube pyrolysis method, which is based on a small quartz tube lined with ordinary ceramic tube for the reaction tube. Pyrolysis through the oxygen carrying water vapor. Sample added mixed oxide as a catalyst, the pyrolysis temperature down to 1050 ℃. The pyrolyzed chloride was absorbed by sodium hydroxide solution and the fluoride in the slag and the flux was measured by ion selective electrode method. The recovery was 100 ± 1% with standard deviation <0.06.