毛细管气相色谱与质谱联用测定液化石油气中C_1～C_5组分研究

Determination of C_1～C_5 Composition of Liquefied Petroleum Gas byCapillary Gas Chromatography Couple with MS

研究了毛细管气相色谱与质谱联用测定液化石油气中 C1～ C5组分的方法 .采用 DB5 MS毛细管柱分离 ,EI离子源四极杆质谱检测 .用纯组分配气混合物作标样 ,实验证明该方法快速、准确、灵敏 .所测组分的相对标准偏差范围在 0 .2 8%～ 0 .4 9% ,其中乙烷、乙烯。

The determination method of C1～C5 composition of liquefied petroleum gas by capillary gas chromatography couple with MS was studied.The colum used was 30 m×0.32 mm i.d. J&W DB 5 MS.The detector was EI source four pole MS instrument.A standard mixture of know composition was used for the determination of correction factors which was used for quantification.The relative standard deviation(n=5) were 0.28%～0.49% and the recovery were 91.8%～99.1%.Ethane,ethylene and butene were separated to basiline.