气相色谱法测定胶粘剂中的游离甲醛

Determination of Free-formaldehyde in Adhesives by Gas Chromatography

中文关键词:  超声波萃取,气相色谱法,甲醛,胶粘剂

英文关键词:ultrasonic extraction,gas,chromatography,formaldehyde,adhesives

中文摘要:

      采用超声波萃取胶粘剂中游离甲醛，经2,4-二硝基苯肼衍生后用气相色谱－电子捕获检测器法测定.对提取方法、衍生化条件及色谱条件进行了研究，确定了甲醛检测的最佳条件.研究数据显示,该方法对甲醛的检出限为0.175 μg/g，在0.1~60 .0 μg/mL浓度范围内，线性相关系数R²=0.9999;在1、2和8 μg/mL 3个添加水平下的添加回收率在98.97%~102.24％之间，5个实验室对同一样品中甲醛含量测定值的相对标准偏差为4.0％.结果表明本方法简便、快速、检测限低、回收率高、重现性好.

英文摘要:

      A method for the determination of free-formaldehyde in adhesives by ultrasonic extraction, 2,4-dinitrophenylhydrazine derivatization, and gas chromatography coupled with electron capture detection (GC-ECD) has been developed. Optimum conditions of extraction, derivatization and chromatography were studied. The detection limit of this method for formaldehyde was 0.175 μg/g. The linear range was 0.1~60.0 μg/mL, R²=0.9999. The recoveries ranged from 98.97％to 102.24% at 1, 2 and 8 μg/mL. The relative standard deviation of formaldehyde content determined by 5 laboratories was 4.0%. Results showed that the method is convenient, rapid, and with low detection limit, high recovery and high repeatability.