【摘要】 建立了Tenax采样管富集气相色谱-质谱测定空气中痕量酚类化合物的方法。用Tenax采样管吸附环境空气中的痕量酚类化合物,用甲醇淋洗解吸酚类化合物,洗脱液加入萘-D8作为内标,利用气相色谱-选择离子监测质谱(GC-M S/S IM)进行检测,内标法定量。该方法定性、定量准确,线性响应良好,回归曲线的线性相关系数均大于0.999,平均回收率为92.4%~102%,测定干扰小,检测灵敏度高,按采样10L计算,空气中最低检测浓度可达0.001m g/m3。用于实际样品测定,完全能满足环境空气中痕量酚类化合物监测的要求。更多还原

【Abstract】 A novel determination method for trace of seven phenol compounds in air samples has been established.They were collected with Tenax adsorption tube（180 mm×60 mm glass tube packed with 150 mg Tenax（40-60 mesh）） and desorbed with methanol.Five microlitres of naphthalene-D₈（internal standard） solution was added to the eluate.One microlitre of the mixture solution was injected into an HP-5MS capillary column（30 m×0.25 mm×0.25 μm） and determined by gas chromatography-mass spectrometry with selected ion monitoring（GC-MS/SIM）.The selected ions were m/z 94,95,66,108,107,77,90,122,121,107 and 136.The quantitative ions,m/z 94 for phenol,m/z 108 for cresol,m/z 122 for xylenol and m/z 136 for internal standard,were selected.The average recoveries of phenol compounds（spiked at the levels of 0.25,1.00,5.00 μg） ranged from 92.4% to 102% and the relative standard deviations were less than 4.8%.When the air sample volume was 10 L,the detection limits were less than 0.001 mg/m³.Good linearities were observed in the range from 0.05 to 20.0 mg/L.The method is simple,fast,sensitive and accurate for the determination of phenol compounds in air samples.更多还原