GC-MS选择分析粘合剂中挥发性有机化合物

Analysis of volatile organic compounds in adhesive material by Gas Chromatography-Mass Spectrometry

目的］建立了ＧＣ—ＭＳ联用直接分析粘合剂中挥发性有机化合物。［方法］采用全扫描法分析了其组成，并用选择离子扫描及内标标准曲线法选择定量分析了粘合剂中１，２－二氯乙烷、苯、甲苯、乙苯、二甲苯。［结果］１，２－二氯乙烷浓度在 ０．００２～０．５０ｍｇ／ｇ，苯在 ０．００１～０．１８ｍｇ／ｇ，甲苯、乙苯在 ０．０１～０．６９ｍｇ／ｇ，二甲苯在 ０．０２～０. ６９ｍｇ／ｇ范围内呈现良好的线性关系，方法的最低检出浓度：１， ２－二氯乙烷为 ０.００２ｍｇ／ｇ，苯为 ０．００１ｍｇ／ｇ，甲苯、乙苯为０．０１ｍｇ／ｇ，二甲苯为０．０２ｍｇ／ｇ，变异系数为０．５％～５．７％。［结论］该方法准确快速。

Objective] A gas chromatographic - mass spectrometric method (G C - M S ) was developed for analyzing volatile organic compounds in adhesive material. [Methods] Utilizing full scans method kinds of volatile organic compounds were analyzed. Using selected ion monitoring and internal standard curve method, 1, 2-dichloroethane, benzene, toluene, ethylbenzene and dimethlbenzene were determined respectively. They were separated on HP- 5 capillary column. The optimum chrornatographic conditions and MS parameter were determined. The characteristic ions were selected to quantify at m/z 62 for 1, 2 -dichloroethane, m/z 78 for benzene, m/z 91 for toluene, ethylbenzene,dimethylbenzene and m/z 85 for octane as internal standard. [Results] The linear range of l, 2-dichloroethane is 0. 002-0. 50mg/g. The linear range of benzene is 0. 001-0. 18mg/g. The ranges of toluene, ethylbenzene are 0. 01-0. 69mg/g. The range of dimethylbenzene is 0. 02-0. 69mg/g. The limits of detection are 0. 002mg/g for l, 2-dichloroethane, 0. 001mg/g for benzene, 0.01mg/g for toluene, ethylbenzene and 0. 02mg/g for dimethylbenzene [Conclusions] The method is simple, fast and reliable.