气相色谱法测定萜烯树脂中有机溶剂残留量的研究与应用

Determination of Organic Solvents Remained in Terpene Resin with Gas Chromatography and Its Application

研究了气相色谱法用于测定萜烯树脂中的有机溶剂残留量的技术,从标准工作曲线绘制、最低检出限、精密度、重复性、回收率等方面验证了方法的可行性,并进行了实际应用效果考察。结果表明,毛细管气相色谱法在测定树脂产品中的甲苯、1,2-二氯乙烷、苯等有机溶剂含量时,甲苯的最低检出限为0.2 mg/L、1,2-二氯乙烷的最低检出限为1.7 mg/L、苯的最低检出限为0.3 mg/L。测定甲苯时的精密度标准偏差为0.04;平均回收率为104.1%,标准偏差为1.99。该方法应用于测定自制的萜烯树脂样品时,未检测到产品中有苯和1,2-二氯乙烷残留,测得甲苯溶剂的残留量小于25 mg/kg。

The determination technique and method of organic solvents remained in terpene resin was studied by gas chromatogra-phy. According to drawing standard curve, testing the precision and repeatability, calculating the lowest detection limit and determining recovery ratio, its feasibility was confirmed. Its practical application effect was further investigated. The results indicated that, the lowest detection limits determined by capillary gas chromatography for toluene, 1,2-dichlorethane and benzene were 0.2 mg/L, 1.7 mg/L, and 0.3 mg/L, respectively. For toluene determination, the standard deviation of determining precision is 0.04; recovery ratio and its standard deviation are 104.1% and 1.99, respectively. While applying the method to determine samples of terpene resin prepared in laboratory, it showed that there was only toluene as organic solvent in the resins and its residual contents was less than 25 mg/kg. No benzene and 1,2-dichloroethane were indicated in the resins.