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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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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Read MoreDue to the increased demand for high-grade steel, vanadium production has doubled in the last 15 years and this editorial suggest a need to improve hazard and risk assessments for vanadium in the environment.
https://pubs.acs.org/doi/ipdf/10.1021/acs.est.8b05560
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Read MoreTNI 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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Read MoreEPA has approved 100 analytical methods for determining contaminant concentrations in drinking water samples. This rule is effective October 12, 2018. Regulated entities required to monitor drinking water may use either the testing methods already established in the existing drinking water regulations or these alternative methods. The new methods include a revision to EPA method 900.0 for gross alpha and beta, 89 updated methods in Standard Methods, 5 ASTM methods, and 2 Hach methods. A reformatted and edited version of this rule (and the Method 900.0, revision 1.0) is available from Catalyst on request. (10/12/2018, 83 FR 51636) https://www.gpo.gov/fdsys/pkg/FR-2018-10-12/pdf/2018-22162.pdf
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