摘要
采用气相色谱内标法测定溶剂型木器涂料中游离甲苯二异氰酸酯(TDI)质量分数,对整个测量过程的不确定度来源进行了分析,建立了其测量结果不确定度的数学模型,并对不确定度的各个分量进行评估和合成,最终得到了测量结果在95%置信区间的扩展不确定度。结果表明:校正因子、重复性测量积分面积是影响游离TDI质量分数测定结果的主要原因。
The mass fraction of free toluene diisocyanate （TDI） in solvent-based coatings is determined by gas chromatography with internal standard method. The resource of uncertainty in the whole measurement procedure is analyzed and the mathematical models are established. Each component of uncertainty is evaluated and combined, finally the expanded uncertainty is obtained by measurement results at 95% confidence intervals. The evaluating results show that correction factor and integral area of repeatability measurements act are the main factors contributing to the combined uncertainty.
出处
《化学工业与工程技术》
CAS
2014年第5期71-74,共4页
Journal of Chemical Industry & Engineering
基金
广东省质量技术监督局科技项目(2012CZ-03)
关键词
气相色谱
内标法
游离甲苯二异氰酸酯
不确定度
gas chromatography
internal standard method
free toluene diisocyanate
uncertainty
