252分析化学第39卷Analysis（分析测试学报），2007，26（2）：267 269自动调节亮度
Determination of Typical Odorous Compounds in Water Using Purge-and-trap Gas Chromatography-Mass Spectrometry
急行跳远教案
Combined with Stable Isotope Dilution
XU Dong-Mei1，2，XU Jun-Ge2，YUAN Bao-Ling*2，L Hua-Dong3，LIN Qi3
急性乳腺炎鲸鱼的简笔画1（College of Environment＆Resources，Fuzhou University，Fuzhou350108）
毛语录
2（College of Civil Engineering，Fuzhou University，Fuzhou350108）
3（Fujian Center for Dia Control and Prevention，Fuzhou350001）
Abstract A stable isotope dilution technique bad on purge-and-trap coupled to gas chromatography with mass spectrometric detection was developed and optimized for the trace determination of the typical odorous compounds，geosmin（GSM）and2-methylisoborneol（MIB）．The lection of quantitation ions and the fac-tors of temperature program，the sample purge temperature，salt content on the extraction of odorous com-pounds were studied．Under the experimental conditions，t
he optimal operating conditions were the addition of 20%（m/V）NaCl，purging at60ħon the temperature program of5ħ/min．D5-Geosmin and d3-MIB as the isotopes internal standards were added to improve the stability of recovery．Using this method，both the calibration curves of MIB and GSM were good linear correlation in the range of5－500ng/L．Recoveries were 82%－95%for GSM and99%－101%for MIB，and precision was5．2%for GSM and0．8%for MIB．The limits of detection for GSM and MIB were3．6and4．1ng/L，respectively．
Keywords Stable isotope dilution；Purge-and-trap；Gas chromatography-mass spectrometry；Odorous compounds
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（Received23June2010；accepted20September2010櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅文艺部
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