【摘要】 建立了涂料中12种挥发性有机化合物(VOC)(壬烷、苯系物和萘)的GC-MS同时检测方法。样品用甲醇进行萃取,萃取液经有机滤膜过滤后,用气相色谱-质谱联用仪进行测定,外标法定量。结果表明:在优化的实验条件下,12种挥发性有机化合物在一定质量浓度范围内与其峰面积呈线性关系,相关系数均不低于0.999;样品的加标回收率为93.6%~105.4%,相对标准偏差(n=4)在0.6%~3.4%。该方法简便、快速、准确性好、精密度高,能够满足检测工作的实际要求。更多还原

【Abstract】 A GC-MS method was developed for the determination of 12 volatile organic compounds(VOC)(e.g. nonane, benzene homologues and naphthaline) in coatings. The sample was extracted with methanol and purified through an organic membrane before performing GC-MS analysis. The external standard was adopted in the determination. The results indicate that under the optimized experiment conditions, there is a linear relationship between the 12 volatile organic compounds and their peak areas within a certain mass concentration range, with correlation coefficients being no less than 0.999. The sample’s index recovery rates are in the range of 93.6%~105.4% and the values of RSD(n=4) are in the range of 0.6%~3.4%. This method is simple, quick, accurate and highly precise, capable of meeting the requirements of actual detection work.更多还原