近红外光谱法快速测定涂料固化剂中游离甲苯二异氰酸酯含量

应用化学, 2014, 31(5): 613-616. doi: 10.3724/SP.J.1095.2014.30402

近红外光谱法快速测定涂料固化剂中游离甲苯二异氰酸酯含量

陈纪文 ^1, , 刘付建 ^2, , 沈宏林 ^3, , 黎军 ^4, , 陈侣平 ^5,

1.广东产品质量监督检验研究院顺德528300

2.广东产品质量监督检验研究院顺德528300

3.广东产品质量监督检验研究院顺德528300

4.广东产品质量监督检验研究院顺德528300

5.广东产品质量监督检验研究院顺德528300

基金项目: 质检公益性行业科研专项经费资助(2012104011-15) Special Funds of Non-profit Industry Quality Supervision for Research(2012104011-15)

关键词：游离甲苯二异氰酸酯 , 近红外透射光谱 , 偏最小二乘法

Determination of Free Toluene Diisocyanate Content in Coating Solidifying Agent by Near Infrared Spectroscopy

Keywords： free toluene diisocyanante , near infrared reflectance spectroscopy (NIR) , partial least square (PLS)

用气相色谱分析值为参照,采用近红外透射光谱(NIR)技术采集相应样品的NIR光谱,研究了涂料固化剂中游离甲苯二异氰酸酯(TDI)含量的快速测定分析方法.并从120个固化剂样品中挑选出109个代表性的样品建模,选择7320～ 7250 cm-1和8485～8370 cm-1波段区间,用偏最小二乘法(PLS)和完全交互验证方式建立TDI含量的预测模型.结果表明,固化剂中游离甲苯二异氰酸酯含量和近红外光谱之间存在较好的相关性,其预测模型的校正集均方差(RMSEC)为0.0815,验证集均方差(RMSEP)为0.0715,模型性能良好.近红外光谱法可快速准确测定游离甲苯二异氰酸酯(TDI)含量,用于固化剂样品快速分析.

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