HP–FFAP毛细管柱气相色谱法测定空气中溶剂汽油

Determination of the Solvent Gasolines in the Air by HP–FFAP Capillary Column and Gas Chromatography

建立了毛细管柱气相色谱法测定空气中溶剂汽油的新方法。空气样品经采气袋采集。色谱柱为HP-FFAP毛细管柱，以氮气为载气，采用直接进样－气相色谱法测定空气中的溶剂汽油。在实验条件下，测定空气中溶剂汽油（以正己烷计），方法线性范围为0．015-1．0μg／mL，线性相关系数大于0．999，检出限为5×10^-3μg／mL，测定结果的相对标准偏差为5．5％（n=15），气体标准物质测定结果的相对误差低于10％。该方法准确度较高，操作简便，可用于空气中溶剂汽油的测定。

A new method was established for determination of solvent gasoline in the air by using capillary column and gas chromatography. Air sample was collected by gas sampling bag, then sample of solvent gasoline in the air was injected directly by injector and detected by GC with an HP-FFAP capillary column and FID detector, using nitrogen as cartier gas. Under the experimental conditions, the sample of solvent gasoline could be determined as n-hexane. The linear range of solvent gasoline was 0.015-1.0 μg/mL, and the correlation coefficient was more than 0.999. The detection limit was 5 × 10^-3μg/mL. The relative standard deviation of detection results was 5.5%（n=15）, and the relative error was less than 10%. The method is accurate, simple, so it is suitable for determination of solvent gasoline in air.