Determination of the Moisture Content in Cigarette Paper by Headspace-Karl Fischer Coulometric Method
In this study,a headspace-Karl Fischer coulometric method was established to determine the moisture content in cigarette paper.By optimizing the experimental conditions such as heating temperature,titration time,sample shape and sample size,the moisture content in cigarette paper was quickly determined.The results showed that the optimum conditions for detecting the moisture content of cigarette pa-per were as follows:drying furnace temperature was 120℃,adopting delay time termination mode,titration time was 10 min,sample mass was 0.06 g.The recoveries of the method were 95.46%～104.99%and the relative standard deviations were 1.12%～4.07%at different spiked levels.Compared with oven method,halogen method and thermal conductivity detection by gas chromatography(GC-TCD)method,the determination results were close,and met the relevant requirements of GB/T 462-2008.The Headspace-Karl Fischer coulometric meth-od could extract water more fully,and truly reflect the moisture content in the sample.Headspace-Karl Fischer coulometric method is sim-ple,rapid,accurate and reliable,and suitable for batch analysis of moisture content in cigarette paper.
国家科技期刊平台
NSTL
万方数据
