The United States Environment Protection Agency (USEPA) Method 8270 methodology is widely used for solid, liquid and gaseous analysis of environmental samples using Gas Chromatography/Mass Spectrometry (GC-MS). This method contains over 70 analytes, including Polycyclic Aromatic Hydrocarbons (PAHs), Pesticides, and Polychlorinated Biphenyls (PCBs). For many environmental laboratories it is a labour intensive, routine high throughput analysis and therefore alternative approaches could provide new possibilities and offer considerable advantages. Early development work using Dispersive Liquid-Liquid MicroExtraction (DiLLME) carried out by John Quick at ALS Environmental shows significant promise as a fully automated approach. Advantages include smaller sample sizes and less use of solvent, reducing both costs and environmental impact. Excellent detection limits and good linearity was achieved on a number of analytes in the test mixture, demonstrating the performance of this approach.
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Initial Work on Automating Dispersive Liquid-Liquid MicroExtraction (DiLLME) for EPA 8270