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      Deanna Bissonnette

      Deanna is an Application Chemist at Biotage. She became a part of Biotage in October 2018.  Her current role involves quality control testing the media that arrives for the production of Atlantic® Disks and Atlantic® ReadyDisks.  Deanna tests the disks and other products that Biotage sells in order to ensure the quality of the products for customers.  Deanna supports the marketing team as well as the application group with application notes. Deanna is a graduate from Saint Anselm College where she obtained her Bachelor's degree in Forensic Science.  She is very interested in the Analytical Chemistry side of her college education, so this position, as an application chemist, is a great place for her to start her career.

      Recent Posts

      How does your sample prep change for LC/MS vs GC/MS

      December 15, 2020 at 11:02 AM / by Deanna Bissonnette posted in LC-MS, GC-MS, Sample preparation, drying extracts, drydisk, gas chromatography, liquid chromatography

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      When preparing your extracts for analysis, it is important to know which instrument to use and why you should be using that specific one. Of course, we know that each EPA method dictates which analysis instrument must be used within each method, however, we will be determining why that option was chosen in the first place in this blog post!

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      Are You Contaminating Your Samples During Evaporation?

      December 14, 2020 at 3:09 PM / by Deanna Bissonnette posted in tech tips, solvent evaporation

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      “Water in my extracts again?!?!”  How many of you have been in that position?  You’ve worked hard to extract your samples, you’ve dried your extracts to remove the last droplets of water from your organic solvent – only to add that water back in during your evaporation step!  There are fewer frustrating situations than losing a set of extracts in this manner.

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      Does it matter whether your dilution solvent is 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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      What does gas vortex shearing do in evaporation? Why should I care?

      December 14, 2020 at 3:03 PM / by Deanna Bissonnette posted in evaporation systems, gas vortex shearing, TurboVap

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      It is question and answer time and we are starting with TurboVap® evaporators and their use in an environmental lab. The TurboVap® evaporation system by design utilizes a patented gas vortex shearing technology. You may be asking yourself, “what does that mean?” I know I did when I first heard about it! Read on to learn more about what this does for your lab evaporation.

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      Hydrophilic Solution for Your Vapor Lock Dilemma

      December 14, 2020 at 2:58 PM / by Deanna Bissonnette posted in Biotage Horizon 3100, hydrophilic solution, spe-dex 1000, spe-dex 3000, vapor lock

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      Have you ever put your water sample onto your Biotage® Horizon 3100 extractor and all your prewet/conditioning steps worked great and then suddenly, the water inlet valve opens, and nothing happens!  This can be terrifying because a lot is riding on those samples!

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      Why are my phenol recoveries low on my EPA Method 8270/625.1 extractions?

      December 10, 2020 at 2:50 PM / by Deanna Bissonnette posted in phenols, US EPA 625.1, US EPA 8270

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      Do you have issues seeing acceptable recovery of your phenols? I know I do. These compounds can be challenging to recover and quantitate, and are also found just about everywhere! Read on to learn a couple of fun facts about phenols, but first, let’s explain why phenols can be difficult to work with.

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      6 Changes to EPA Method 8270 That You May Not Be Aware Of

      December 10, 2020 at 2:40 PM / by Deanna Bissonnette posted in SPE solid phase extraction, EPA Method 8270, application

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      The U.S. EPA monitors a variety of compounds that pose public health risks when they are present in our air, soil or water and they have spent decades publishing methods to help us extract and quantify those compounds. The 8000 Series EPA Methods describe the extraction and analysis of contaminants in groundwater and Method 8270 specifically covers semi-volatile compounds.

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      Why are flow rates so important in sample prep?

      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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      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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      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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