Tenax采样管富集气相色谱-质谱法测定空气中的痕量酚类化合物  

Determination of Trace Phenol Compounds Using Gas Chromatography-Mass Spectrometry Coupled with Tenax Adsorption Tube for Enrichment of Air Samples

作　　者：杨丽莉[1] 胡恩宇[1] 母应锋[1] 纪英[1] 

机构地区：[1]南京市环境监测中心站,江苏南京210013

出　　处：《色谱》2007年第1期48-52,共5页Chinese Journal of Chromatography

基　　金：江苏省大型科学仪器设备共享服务平台理事会资助项目(江苏省科学技术厅(苏科条函(2006)57号)

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—MS／SIM）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，宅气中最低检测浓度可达0．001mg／m^3。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。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/z94, 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, 5.00μg） 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/m^3. 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.

关 键 词：Tenax采样管 气相色谱-质谱法 酚类化合物 空气样品 

分 类 号：O658[理学—分析化学]