环境中总石油烃的气相色谱分析测定

将总石油烃划分为挥发性汽油类(C6～C10)、可萃取柴油和重油类(C10～C40)两部分,分别建立了通过吹扫捕集、液液萃取和超声溶剂萃取分离富集,气相色谱-火焰离子化检测器(GC-FID)测定环境水体和土壤中总石油烃的分析方法。以汽油、柴油、润滑油标准溶液进行外标校正,以色谱出峰总面积进行定量。汽油类(C6～C10)的检出限分别为0.04mg/L和0.42mg/kg,柴油和重油类(C10～C40)的检出限分别为0.06mg/L和4.9mg/kg。方法的精密度和准确度均良好。

TPH Determination in Environmental Matrix by GC-FID

Analysis of soil and groundwater samples for total petroleum hydrocarbons （TPH） have been built to measure the to- tal concentration of petroleum hydrocarbons including volatile range C6 to C10 and extractable range organics C10 to C40. The methods were developed on the basis of purge trap, solvent extraction and sonic extraction and then analyzed by gas chromatography equipped with flame ionization detection subsequently. Gasoline, diesel, and lubricating oil were used as the external calibration standards and the spike area is used for quantification. As for groundwater and soil samples, the detection limit for gasoline （C6-C10 ） are 0. 04 mg/L and 0.42 mg/kg, and for diesel （ C10 - C40） are 0.06 mg/L and 4.9 mg/kg. The precision and accuracy of this meth- od are both fine.