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      Contaminants in your your lab? What you should look for.

      July 21, 2021 at 8:15 PM / by Stephen Panos posted in SPE solid phase extraction, EPA Method 537.1, epa method 525.2

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      If you are processing environmental samples then you’ve probably dealt with contamination at some point. If you haven’t, then you should be congratulated for creating the only laboratory on Earth that has ever been completely free of all sources of contamination!

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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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      The Importance of Quality Control on Lab Solvents & SPE Consumables

      April 22, 2021 at 5:00 PM / by Deanna Bissonnette posted in SPE solid phase extraction, epa method 525.2, epa method 525.3, quality control, spe consumables

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      Ever wonder if you need to perform quality control (QC) on solvents and solid phase extraction (SPE) consumables? Well, the answer is yes! You want to make sure that your disks and solvents are good to go before running real-life samples and risk losing that sample. Not only that, but QC samples also help to identify any background in your lab's extraction procedures.

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      What is the difference between an Internal Standard and Surrogate?

      April 1, 2021 at 1:00 PM / by Michael Ebitson posted in epa method 525.2, water extractions, Internal Standard, Surrogate

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      Have you ever worked with new methods and said to yourself “yes I know what these internal standards and surrogates are measuring and when to add them to the samples”? Sounds familiar right? Well, I remember when I first started working in the laboratory and needed to fully understand and follow all method protocols and standard operating procedures (SOPs). One of the questions I asked was, what is the difference between method 525.2 and its internal standard and surrogates versus every other method we extract and analyze?

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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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      What is the best way to dry extracts for drinking water samples?

      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’s Your Grade? I’m usually ACS, although sometimes I’m Reagent.

      December 4, 2020 at 1:54 PM / by Stephen Panos posted in Solvents, SPE solid phase extraction, application, epa method 525.2

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      If you’re reading this and raising your eyebrows, you’ve never had, what I like to call, the “grade discussion.” I don’t mean the discussion between high school or college students who are comparing grades after a big mid-term or final exam (although I used to do that too). I mean the discussion over the solvent grade you use in your laboratory.

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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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