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      Myth Busters: Smaller Sample Volumes - EPA Method 1664B

      December 16, 2020 at 9:22 AM / by Michael Ebitson posted in oil and grease, wastewater, epa method 1664b

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      Have you ever had days of extracting oil and grease samples and thought to yourself “there must be an easier way to work with wastewater samples”? Whether you run oil and grease samples by liquid-liquid extraction (LLE) or by solid-phase extraction (SPE) it can be challenging at times to efficiently extract 1-liter samples due to the sample matrix.

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      Are Your Proficiency Testing Results Failing for Method 1664?

      December 14, 2020 at 3:01 PM / by Michael Ebitson posted in SPE solid phase extraction, LLE liquid-liquid extraction, tech tips, oil and grease, epa method 1664b, proficiency testing

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      It is that time of year again when laboratories are fulfilling accreditation requirements for the methods that they offer. One of the requirements that must be met for each method is called proficiency testing (PT).

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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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      Reducing the Headache of Challenging Emulsions

      December 4, 2020 at 1:55 PM / by Andrew Taylor posted in SPE solid phase extraction, emulsions, application, oil and grease, HEM, epa method 1664b

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      Have you ever opened a jar of olives and noticed the shimmering liquid floating on the surface? Believe it or not, that liquid is actually residual oil that is given off by the olives themselves.

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      Why streamline inline drying for EPA Method 1664b?

      December 4, 2020 at 1:54 PM / by Michael Ebitson posted in sodium sulfate, epa method 1664b, drying extracts, Biotage Horizon 3100, ISOLUTE

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      When in the lab I always try to streamline and improve workflows. One of the biggest bottlenecks in the lab I’ve experienced and maybe you have too, is the drying of sample extracts.

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