标准及检测
第43卷第8期 2013年8月
不工楼奖
PAINT&COATINCS INDUSTRY
Vol.43No.8 Aug,2013
氧弹燃烧一离子色谱法测定氟树脂原料与涂料中
氟含量的检测方法研究及不确定度评定
谭帅霞，邓江华，昌慧娟，刘国钧，任申玥，王进
（株洲时代新材料科技股份有限公司，湖南株洲412007）
摘要：讨论了氟树脂原料及涂料样品中溶剂可溶性氟含量的测定方法。首先以氧弹燃烧分解氟树脂，把其中的氟转化为氟离子，然后用离子色谱法定量分析溶剂可溶性氟含量。在扩展不确定度取包含因子2，置信率为95%时，氧瓶燃烧-电位滴定法测定结果均处于氧弹燃烧－离子色谱法测定不确定度区间中，表明2种检测方法结果同样有效可信，且氧弹燃烧-离子色谱法操作简单、准确可靠。
关键词：氟树脂涂料；溶剂可溶性氟含量：离子色谱法：不确定度
中图分类号：TQ630.7*2
文章编号：0253-4312(2013)080050-05
文献标识码：A
DeterminationofFluorineContentinFluorocarbonResin
andCoatingsbyOxygenBombCombustion--Ion Chromatography andEvaluation of Uncertainty
Tan Shuaixia, Deng Jianghua, Chang Huijuan, Liu Guojun, Ren Shenyue, Wang Jin
(Zhuzhou Times New Material Technology Co.Ld.,ZhuZhou, Hunan 412007,China)
Abstract:The fluorine content measuring method in fluorocarbon resin and coatings were discussed.As fluorocarbon resin and coatings was decomposed by oxygen bomb combustion, to couvert fluorine in the sample into ions, which was then determined by lon chromatography. Additionally, the uncertainty of measurement was evaluated, and all the values measured by oxygen flask burning - potentionmetric titration were in the range of the uncertainty interval(with the coverage factor 2 under the 95% trusting probability） by oxygen bomb combustion ion chromatography. The results showed that these two methods were effective and credi-ble, and oxygen bomb combustion ion chromatography was easy,accurate and reliable.
Key Words:fluorocarbon resin coatings; soluble fluorine content in solvent: ion chroma-tography; uncertainty
交联型氟树脂涂料由于氟树脂中氟碳键的存在，具有优异的耐候、耐腐蚀、保光、保色、耐沾污等性能。氟树脂涂料中氟含量的多少直接影响涂料的性能。因此，通过氟含量的测定，将能够帮助消费者更好地了解氟树脂涂料产品的品质。
对于氟碳面漆中溶剂可溶性氟含量，HG/T 3792—2005《交联型氟树脂涂料》[1]规定了采用氧瓶燃烧－电位滴定法，但该方法每次测试前都要测定电极的斜率，电位稳定时间长，且电极浸入深度、搅拌速度等对结果有影响，测量需要经验。李雅波等(2]建
作者简介：谭帅霞（1982一），女，博士，高级工程师，主要研究方向：精密仪器分析及材料性能表征。 50