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      An Alternative To n-Hexane For Doing Oil and Grease Extractions

      December 17, 2020 at 1:45 PM / by Andrew Taylor posted in SPE solid phase extraction, application, oil and grease, n-hexane


      Volatile. Flammable. Skin irritant. Respiratory irritant. Possibly fatal if swallowed. For those of you processing samples according to EPA Method 1664B, you’ve seen these hazard descriptions before – on the safety data sheet (SDS) for n-hexane. For those of you who aren’t familiar with (or have forgotten about) the hazards related to n-hexane, those are just a few. It also smells unpleasant and could explode if heated. It’s a relatively unpleasant organic solvent to work with and it begs the question:

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      Tips for Improving Your Oil & Grease Recoveries

      December 10, 2020 at 2:36 PM / by Maura Rury posted in application, oil and grease, epa method 1664b, n-hexane

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      On the surface, EPA Method 1664B seems pretty straightforward – use n-hexane to extract compounds (commonly referred to as “oil and grease”) from an acidified water sample. Evaporate the hexane from the extract, weigh the residue that gets left behind, and report that weight in terms of a concentration (often as mg/L of HEM).

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