What is SGT-HEM and how do you test for it?
If you have ever worked in an environmental laboratory, you might have heard of EPA method 1664B. Method 1664B is an extraction method with analysis by gravimetry that measures oil and grease in waste...
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Showing posts written by Michael Ebitson
Alumina sample cleanups and how can you implement in your workflow?
If you are working in an environmental lab and encounter tissue samples and highly contaminated petroleum soil samples that create a lot of noise and interference on your analytical instruments, then ...
Why and when is florisil cleanup necessary with sample extracts?
No matter what your sample will be tested for, if you are extracting with liquid-liquid extraction (LLE), solid phase extraction (SPE), accelerated solvent extraction (ASE) or microwave, your sample's...
Why streamline inline drying for EPA Method 1664b?
When in the lab I always try to streamline and improve workflows. One of the biggest bottlenecks in the lab I’ve experienced and maybe you have too, is the drying of sample extracts.
What is the difference between an Internal Standard and Surrogate?
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 r...
Why Concentrate Down to 1 mL End Point? Can you go down to 0.5 mL?
When working with regulated environmental methods have you ever asked yourself why are all these extracts concentrated down to one milliliter (mL) final volume? This is true for most soil and aqueous ...
What to know when transitioning from EPA method 525.2 to 525.3
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 ...
Reusable vs single-use disk holders – Which is best-suited for your application?
Have you ever thought to yourself am I using the best solid phase extraction disk offering for my application? Or can our prep lab turn samples around more efficiently if we choose a different SPE dis...
Myth Busters: Smaller Sample Volumes - EPA Method 1664B
Have you ever had days of extracting oil and grease samples and thought to yourself “there must be an easier way to work with wastewater samples”? Whether you run oil and grease samples by liquid-liqu...
How to Optimize Your Sample Filtering for Hemp, Cannabis and Edible Products
If you have ever worked with samples in the food industry you must have run into the challenges of working with various matrices. Each of them ranging from gummies, flour and oils can keep providing c...