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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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      The Chemistry of SPE

      November 30, 2020 at 4:38 PM / by Maura Rury posted in SPE solid phase extraction, Solid-phase extraction, application, spe disk

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      If you’re like me, you start the new year off with a list of resolutions for the coming months – resolutions to be more fit or to secure a promotion at work, or to reduce your carbon footprint.

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      Why is it so important to air dry your SPE sorbent?

      November 30, 2020 at 3:21 PM / by Deanna Bissonnette posted in tech tips, spe disk, epa method 525.2, C18 disk

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      Every step within a solid phase extraction (SPE) procedure is imperative, but one of the most important steps that must be done properly is the air-dry step.

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      What does a thermistor do anyway?

      November 30, 2020 at 3:13 PM / by Stephen Panos posted in Solid-phase extraction, biotage horizon 5000, thermistors

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      It is easier to understand something when you know what the actual word means. A thermistor is a portmanteau (yes, sometimes I do pay attention to linguistics) of the words thermal and resistor. This means that when a thermistor is heated, its resistance is either increased or decreased based on the properties of that particular thermistor.

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      Extraction of Polyphenols in Tea with Lemon

      November 30, 2020 at 2:31 PM / by Andrew Taylor posted in EPA Method 8270, catechins, polyphenols

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      For thousands of years, tea has been one of the most popular drinks around the world. Not only is tea delicious, but it is also full of health benefits. Tea is an abundant source of antioxidants called polyphenols. One of these polyphenolic compounds, catechins, is found mostly in green tea.

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      Tackling Emulsions Just Got Easier

      November 30, 2020 at 1:19 PM / by Maura Rury posted in SPE solid phase extraction, Solid-phase extraction, emulsions, LLE liquid-liquid extraction, LLE, application, awareness

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      Believe it or not, we’re all familiar with emulsions.  Have you ever added food oil to a pot of water while cooking?  That’s an emulsion.  Do you put dressing on your salad?  It should be called salad emulsion – although, that may not have the same edible appeal.  Do you drink milk?  Emulsion.  What about milk?  Butter?  Eggs?  All emulsions.

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      Simplified BPA Analysis

      November 30, 2020 at 1:17 PM / by Andrew Taylor posted in SPE solid phase extraction, application, BPA, bisphenol

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      Bisphenol A (BPA) is one of the most widely produced chemicals in the world – approximately 4 million metric tons annually. In recent years, BPA has received a lot of negative attention. In fact, I can’t remember the last time I saw a plastic item in the store that didn’t have a “BPA free” marking on it.

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