We always get up to interesting work in our beautiful corner of the world in the Pacific Northwest off the Salish Sea! This study (Lee et al. 2023) from the University of British Columbia and Fisheries and Oceans Canada is especially topical as it tracks the sources, and maternal transfer of Polycyclic Aromatic Compounds (PACs or […]
Author Archives: Bharat Chandramouli
We are pleased to offer a sensitive and specific isotope dilution LC-MS/MS method for the measurement of Trifluoroacetic Acid (TFA) and 4 other ultrashort perfluoroalkyl carboxylates and sulfonates. Our method measures these targets at low ng/L from an EPA 1633 extract meaning the same sample can now be used to generate both 1633 data and […]
17
Jun
Jun
On 15-June-2022, the EPA announced Interim Health Advisory Levels (HALs) for PFOS and PFOA (updated), and Final Health Advisory levels for GenX chemicals and PFBS. The PFOS and PFOA numbers were eye-popping! Interim updated HAL for PFOA = 0.004 parts per trillion (ppt) Interim updated HAL for PFOS = 0.02 ppt Final HAL for GenX […]
01
Mar
Mar
Please join Bharat Chandramouli, Ph.D., for a free webinar Wednesday, March 3, 2021 at 1:45 PM EST, presented by Waters. Dr. Chandramouli will be discussing the successful review of SGS AXYS Method ATM 16130 – Determination of 2,3,7,8-Substituted Tetra- through Octa-Chlorinated Dibenzo-p-Dioxins and Dibenzofurans (CDDs/CDFs) Using Waters and Agilent Gas Chromatography-Tandem-Mass Spectrometry (GC/MS/MS) by the US […]
20
May
May
Information on the occurrence of contaminants of emerging concern (CEC) in the aquatic ecosystems that North American indigenous communities depend on is scarce. Given the particular importance of these ecosystems for food and economic security of indigenous communities, assessing the presence of contaminants becomes very important. Therefore, we wanted to highlight an excellent study [1] […]
31
Mar
Mar
The PFAS on the regulatory radar, such as PFOS, PFOA, and other related targets on typical laboratory lists, are anionic, or neutral. Therefore, the methods are optimized for anionic PFAS and feature standardized solid extraction using methanol containing ammonia, and weak anion exchange cleanup. However, many aqueous film forming foam (AFFF) active ingredients can be […]
17
Mar
Mar
To our valued clients. SGS AXYS continues to monitor the COVID-19 situation and restrictions closely. The laboratory is open and all laboratory operations including sample receiving are fully functional. The Canadian Federal Government and BC Provincial Government recognize the importance of US-Canadian essential services and commercial activity and have prioritized the continued movement of commercial […]
16
Mar
Mar
Summary SGS has developed and validated accurate, sensitive and accessible polychlorinated biphenyls (PCBs) analysis by GC-MS in support of the US EPA’s initiative to update the PCB measurement strategy for the National Pollutant Discharge Elimination System (NPDES) permit program. Background Polychlorinated Biphenyls (PCBs) are ubiquitous contaminants regulated under the US Clean Water Act. Currently, the […]
12
Feb
Feb
We in British Columbia love our Pacific wild salmon and view them as keystone species and indicators of ecosystem wellbeing. Numbers have dropped significantly recently from multiple stressors including climate change, habitat loss, pollution and more. With current and proposed pipelines that will carry diluted bitumen (dilbit) from the oil sands through spawning habitat and […]
29
Jan
Jan
The widespread use of aqueous film forming foams (AFFF) containing PFAS at airports all over the world has resulted in contamination of ground and surface water, and soil. In addition to the many ecosystem effects that are still being studied, how are microbial communities affected? Which PFAS are microbes able to degrade and how does […]
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