Seeley Stacy K, Bandurski Steven V, Brown Robert G, McCurry James D, Seeley John V
Kettering University, 1700 W. Third Ave, Flint, MI 48504, USA.
J Chromatogr Sci. 2007 Nov-Dec;45(10):657-63. doi: 10.1093/chromsci/45.10.657.
A flow-switching two-dimensional gas chromatography (GCxGC) apparatus has been constructed that can operate at temperatures as high as 340 degrees C. This system is employed to analyze complex hydrocarbon mixtures such as diesel fuel, gas-oil, motor oil, and petroleum contaminated environmental samples. The GCxGC system generates two-dimensional chromatograms with minimal overlap between the aliphatic and aromatic regions This allows these compound classes to be independently quantitated without prior fractionation. The GCxGC system is used to analyze extracts of spiked water samples, wastewater, and soil. The accuracy of the method is compared to that of the Massachusetts Extractable Petroleum Hydrocarbons (MA EPH) method. The GCxGC system generates a quantitative accuracy similar to the MA EPH method for the analysis of spiked water samples. The GCxGC method and the MA EPH method generate comparable levels of total hydrocarbons when wastewater is analyzed, but the GCxGC method detects a significantly higher aromatic content and lower aliphatic content. Both the GCxGC method and MA EPH method measure comparable levels of aromatics in the soil samples.
已构建了一种可在高达340摄氏度的温度下运行的流路切换二维气相色谱（GCxGC）装置。该系统用于分析复杂的烃类混合物，如柴油、瓦斯油、机油和受石油污染的环境样品。GCxGC系统生成的二维色谱图中脂肪族和芳香族区域之间的重叠最小。这使得这些化合物类别无需预先分馏即可独立定量。GCxGC系统用于分析加标水样、废水和土壤的提取物。将该方法的准确度与马萨诸塞州可提取石油烃（MA EPH）方法的准确度进行比较。对于加标水样的分析，GCxGC系统产生的定量准确度与MA EPH方法相似。分析废水时，GCxGC方法和MA EPH方法产生的总烃含量相当，但GCxGC方法检测到的芳香族含量明显更高，脂肪族含量更低。GCxGC方法和MA EPH方法在土壤样品中测得的芳香族含量相当。
