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      Why Concentrate Down to 1 mL End Point? Can you go down to 0.5 mL?

      April 29, 2021 at 3:00 PM / by Michael Ebitson posted in SPE solid phase extraction, Sample preparation, tech tips, EPA Method, Drying, application, evaporation systems, lower volume samples

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      When working with regulated environmental methods have you ever asked yourself why are all these extracts concentrated down to one milliliter (mL) final volume? This is true for most soil and aqueous methods. Of course, a few methods will require a more diluted final volume but not many.

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      EPA Methods and the Use of Drying Techniques

      November 30, 2020 at 4:43 PM / by Deanna Bissonnette posted in SPE solid phase extraction, contamination, solvent evaporation, EPA Method, Drying, application, sodium sulfate

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      Do you ever tire of using sodium sulfate to dry your extracts? I know I do. That is why, whenever I get the chance to avoid using it, I do. The worst experience when using sodium sulfate is when you do not use enough of it, and the sodium sulfate reaches its maximum capacity leading to water breakthrough into your ‘what was supposed to be a dried extract.’ Then, you must dry the extract again with more sodium sulfate.

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