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The Total Oxidizable Precursor (TOP) Assay is an oxidative sample pre-treatment method aimed at converting the PFAS (Perfuoroalkyl Substances) within a sample into the stable perfluoroalkyl acids that can be quantified by conventional LC/MS/MS analytical techniques, thereby providing a greater understanding of the extent of PFAS within a sample. The oxidation is achieved by hydroxyl radicals, formed under heated alkaline conditions from prescribed amounts of potassium persulfate (KPS) and sodium hydroxide (NaOH) added to the sample prior to incubation. Read More

In this issue, we look at the U.S. Consumer Product Safety Commission (CPSC) who has issued a final rule to establish ASTM F963-17 as the mandatory Standard Consumer Safety Specification for Toy Safety, and ALS will be exhibiting at the UK Spring Fair 2018. Read More

EnviroMail™ 118 looks at what Zooplankton are, its influence on water quality, guidelines and water industry applications, and the analysis of Zooplankton. Read More

With another successful client-only Q&A Webinar completed for 2017, these are the handouts that accompany the topics discussed by Peter Keyte on testing for Asbestos in soil. Read More

Most environmental practitioners understand that field filtration is considered the best practice when collecting water samples for dissolved metals testing, but many people may be unaware of the causes and potential magnitude of negative consequences associated with delayed filtration.  Read More

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ALS Malaysia is the proud recipient of the IKM President Laboratory Award for Category 3 - Commercial Testing Laboratories. Read More

Freight and logistics can play a significant part in the process of any sampling and analysis plan. Often holding times and temperature are crucial.  Both aspects add a level of complexity and require serious consideration when shippping samples. Read More