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      Common Mistakes by the Lab Series: The Pain of Contaminated Squeeze Bottles

      December 16, 2020 at 9:42 AM / by Deanna Bissonnette posted in Sample preparation, Solid-phase extraction, SPE, phthalates

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      Ugh…I think we can all agree that the worst thing that can happen when testing high profile samples is losing an extract due to phthalate contamination. Whether you are extracting 525.2 or 625.1 samples, phthalates can ruin your day and wreak great havoc, causing false positives!

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      How to plan for dirty samples for both extraction and analysis

      December 16, 2020 at 9:39 AM / by Matt Harden posted in Sample preparation, Solid-phase extraction, wastewater, gas chromatography, SPE, dirty samples

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      When juggling the responsibilities of working in a sample preparation lab as well as working as an analyst, it is very easy to get caught up in a never-ending cycle of samples. There is no situation “more frustrating” then when you have a bunch of wastewater samples that need to be extracted and analyzed ASAP and there is that one sample that is so much more challenging to extract than the others.

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      Simplifying Water Extractions with SPE – One Matrix, One Method Extraction

      December 15, 2020 at 1:09 PM / by Deanna Bissonnette posted in Sample preparation, Solid-phase extraction, water extractions

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      Have you ever thought to yourself I wish there was one way to effectively extract all of our aqueous samples? For instance, there are several methods available to extract aqueous samples, such as extraction method 3510 liquid-liquid extraction (LLE), method 3520 continuous liquid-liquid extraction (CLLE), and method 3535 solid-phase extraction (SPE). Wouldn’t it be more convenient to use one extraction method within the lab for most if not all of your aqueous extractions?

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      SLE, SPE and LLE – How are Those Different?

      December 14, 2020 at 3:07 PM / by Maura Rury posted in SPE solid phase extraction, Solid-phase extraction, LLE liquid-liquid extraction, LLE, SLE, educational

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      Liquid-liquid extraction (LLE), supported liquid extraction (SLE), and solid-phase extraction (SPE) have existed for decades and if you’re doing organic sample preparation, you’re probably quite familiar with at least one of these techniques.  But are you familiar with all of them?  How are they similar?  How are they different?  Let’s review!

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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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      The Secret to Tackling Dirty Samples

      December 3, 2020 at 2:37 PM / by Maura Rury posted in Solid-phase extraction, tech tips, spe disk, oil and grease, wastewater, prefilters

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      Solid phase extraction is a powerful technique – it can be used to clean up the most challenging samples, and extract and preconcentrate hundreds of semivolatile organic compounds.

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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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      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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      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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