气相色谱法测定天然气中四氢噻吩

Determination of gas chromatography of tetrahydrothiophene in natural gas

本文采用气相色谱法建立了天然气中四氢噻吩的分析方法。四氢噻吩是天然气中的加臭剂,它具有强烈的不愉快气味且产生的臭味稳定、不易散发,空气中存在0.01mg·m^(-3)就能闻到。该方法中使用了OV-101专用毛细管色谱柱和氢火焰检测器进行检测,绘制四氢噻吩工作曲线,四氢噻吩的最低检出限能到达0.5mg·m^(-3)。经6次的重复测定,其相对标准偏差小于0.02%。该方法用于天然气中四氢噻吩的测定,取得了令人满意的结果。

A method was established for the determination of the tetrahydrothiophene in natural gas by gas chromatography. Tetrahydrothiophene is odorant of natural gas, it has a strong odor and an unpleasant odor gener- ated in a stable, uneasy to distribute, you can smell it when the presence of 0.01mg·m-3 in the air. The method used in the OV-101 dedicated capillary column and FID detection,drawing tetrahydrothiophene eurve,tetrahydrothiophene minimum detection limit can reach 0.5mg·m-3. After six times repeated measurements, the relative standard deviation of is less than 0.02%. The method is used to determine the natural gas tetrahydrothinphene achieved satisfactory results.