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      The Problem of PFAS: Part 2 - Top Regulations

      June 3, 2021 at 3:00 AM / by David Gallagher posted in SPE solid phase extraction, Sample preparation, EPA Method 537.1, per- and polyfluoroalkyl substances, PFAS, Drinking water, EPA Method, water extractions, SPE, perfluorinated compounds, PFOS, extraction, ISOLUTE 101

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      Welcome back! As the title indicates, this is Part 2 of an ongoing series where we discuss what’s going on with PFAS. For those of you who may not have read Part 1, you missed out on a summary of the controversy surrounding this group of compounds and I would recommend going back and taking a quick read through it to make sure that you’re caught up. 

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      What to know when transitioning from EPA method 525.2 to 525.3

      May 20, 2021 at 9:00 AM / by Michael Ebitson posted in SPE solid phase extraction, Drinking water, epa method 525.2, epa method 525.3

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      When learning that you may be transitioning to a newer revision of an EPA method some thoughts may come to mind such as: it took so long to perfect this sample preparation method, or I hope they have some improvements and or greater flexibility allowances in this revision. Well, that is exactly what we will touch upon in this blog post - sample preparation improvements.

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      To Be or Not to Be Water Miscible

      December 14, 2020 at 3:04 PM / by Deanna Bissonnette posted in SPE solid phase extraction, Drinking water, LLE liquid-liquid extraction, water miscible solvents, CLLE continuous liquid liquid extraction, EPA Method 8270, EPA Method 3500

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      For anyone who processes samples in an EPA-regulated laboratory, you know that these methods can be very specific in some spots, and incredibly vague in others. 

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      Improvements in Processing Drinking Water Samples Part 2

      December 10, 2020 at 2:39 PM / by Andrew Taylor posted in SPE solid phase extraction, Drinking water, application, epa method 525.2, epa method 525.3

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      In the first part of this 2-part blog series, I highlighted the improvements made by the EPA regarding the preparation and preservation of samples. In this post, I will focus more on the changes the EPA has made to Method 525 which affect the analysis of the prepared samples.

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      Improvements in Processing Drinking Water Samples by Method 525

      December 10, 2020 at 2:38 PM / by Andrew Taylor posted in SPE solid phase extraction, Drinking water, epa method 525.2, epa method 525.3

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      Since its release in 1995, EPA method 525.2 has been one of the most widely used methods for quantifying semi-volatile compounds in drinking water. Chances are, if you work for or own a drinking water lab, you probably analyze for compounds in this method – at the very least, you’re probably at least familiar with the method.

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      Solid Phase Extraction of Drinking Water – How do I Dry My Extracts?

      December 7, 2020 at 2:23 PM / by Maura Rury posted in SPE solid phase extraction, Drinking water, epa method 525.2, sodium sulfate, drying extracts

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      If you’re a laboratory that’s processing drinking water samples using solid phase extraction, you’ve inevitably gotten to the step in your procedure where you’ve eluted your analytes from your SPE media and you find yourself saying “How do I dry my extracts?”

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      What are the differences between EPA Method 533 vs 537.1?

      December 7, 2020 at 2:02 PM / by Matt Harden posted in SPE solid phase extraction, Solid-phase extraction, EPA Method 537.1, per- and polyfluoroalkyl substances, PFAS, EPA Method 533, Drinking water

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      Per- and polyfluoroalkyl substances (PFAS) are a group of harmful organic compounds that are very persistent in structure. What this means is PFAS compounds accumulate in the environment over time as they do not break down easily. This makes it a concern to regulate and test these compounds as they have been shown to have adverse effects. One of the most common ways that someone would come in contact with PFAS is through drinking water.

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      Do Flow Rates Matter in SPE?

      December 2, 2020 at 5:32 PM / by Deanna Bissonnette posted in SPE solid phase extraction, Sample preparation, Drinking water, flow rates, C18 Disks

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      Have you ever wondered why solution flow rates are so important when performing sample preparation with solid phase extraction (SPE)?  If you have, read on – I have the answer for you!

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      1,4 Dioxane Contamination and Updated Regulations – Are You Being Impacted?

      December 2, 2020 at 5:09 PM / by Andrew Taylor posted in SPE solid phase extraction, Drinking water, EPA Method 8270, epa method 522, 1,4 dioxin, UCMR

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      In a never-ending list of chemical pollutants, a compound that is gaining a lot of attention is 1,4-dioxane. In fact, New Jersey just became the first state to set regulations on the quantity of 1,4-dioxane that can be present in drinking water.

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