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EPA Releases Method 537.1 for PFAS

Method 537.1 is a solid phase extraction (SPE) liquid chromatography/tandem mass spectrometry (LC/MS/MS) method for the determination of selected per- and polyfluorinated alkyl substances (PFAS) in drinking water. https://www.epa.gov/water-research/epa-drinking-water-research-methods

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EPA Identification of New Iodinated Disinfection Byproducts

Iodinated contrast media (ICM) are nonmutagenic agents administered for X-ray imaging of soft tissues. ICM can reach μg/L levels in surface waters because they are administered in high doses, excreted largely unmetabolized, and poorly removed by wastewater treatment. One new iodomethane (trichloroiodomethane), three new iodoacids (dichloroiodoacetic acid, chlorodiiodoacetic acid, bromochloroiodoacetic acid), and two new nitrogenous I-DBPs (iodoacetonitrile and chloroiodoacetonitrile) were identified in this study. https://pubs.acs.org/doi/10.1021/acs.est.8b04625

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Revised Small Laboratory Handbook Published

TNI has released the 2016 version of the Small Laboratory Handbook. This document is intended to help explain the requirements of the 2016 Standard and to provide environmental laboratories, especially small laboratories, with clear, simple guidance on how to develop the policies and procedures that will allow them to become accredited to the TNI Standard. The revised handbook includes much more “How to” information. and also contains a discussion of the accreditation process and several appendices with useful information, including common findings, SOP templates, and answers to standard interpretation requests. https://nelac-institute.org/content/NELAP/howto.php

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