Application Note: Gasoline Range Organics (GRO) By Headspace/GC/FID

By Teledyne Tekmar

Recent oil spills in the Gulf of Mexico and the Great Barrier Reef have renewed interest in the rapid analysis of crude oil byproducts in aqueous and solid samples including sand and commercial fishing products. One of the crude oil constituents, gasoline range organics (GRO) is currently determined by either EPA Method 8015C or Wisconsin's modified GRO.

A Teledyne Tekmar HT3™ Headspace Analyzer was used in both the static and dynamic modes to determine GRO in water using an Agilent GC/FID system. The static method was linear from 50 to 1000ppb and the dynamic from 2 to 200ppb. This calibration data meets the requirements for both EPA Method 8015C and Wisconsin's modified GRO.