气相色谱-质谱联用法测定聚氨酯类防水涂料中8种芳香族化合物

Determination of Eight Aromatic Compounds in Polyurethane Waterproof Coating by Gas Chromatography-Mass Spectrometry

建立了气相色谱-质谱(GC-MS)法同时测定聚氨酯类防水涂料中8种芳香族化合物(苯、甲苯、乙苯、对/间二甲苯、邻二甲苯、苯酚、萘、蒽)的分析方法。研究了乙酸乙酯、乙酸丁酯、丙酮、乙腈和乙醇对各目标物质的提取和分离效果。样品以正十一烷为内标物,经乙酸乙酯超声提取,以选择离子(SIM)进行定性及定量分析。8种芳香族化合物在0.01～2.40 g/L范围内呈良好的线性关系,相关系数r>0.99。平均回收率为95%～109%,相对标准偏差(RSD,n=6)为0.7%～4.9%,检出限(LOD,S/N≥3)为0.001 g/kg。使用该方法检测了10份市场上常见的聚氨酯类防水涂料,所得结果可靠。该方法具有重现性好、灵敏度高和操作简单等特点。

A simultaneous determination method was developed for the quantification and confirmation of 8-aromatic-compounds，including benzene,toluene,ethylbenzene,p,m-xylene,o-xylene,phenol,naphthalene and anthracene,in polyurethane waterproof coating by gas chromatography-mass spectrometry（GC-MS）.The extraction and separation efficiencies of targeted compounds were investigated by using organic solutions of ethyl acetate,butyl acetate,acetone,acetonitrile and ethanol.The 8 aromatic compounds were extracted with ethyl acetate,and determined by GC-MS under the selected ion mode（SIM） using undecane as the internal standard.The calibration curves showed good linearities in the range of 0.01-2.40 g/L with correlative coefficients（r） larger than 0.99.The average recoveries were in the range of 95%-109% with relative standard deviations（RSD,n=6） of 0.7%-4.9%.The limits of detection（LOD,S/N≥3） were all 0.001 g/kg.This method was applied in the determination of aromatic compounds in 10 polyurethane waterproof coatings on sale with satisfactory results. The method shows the advantages of good reproducibility,high sensitivity and simple operation.