Innovative cryogen-free ambient air monitoring of trace-level air toxics at high humidity
November 27th 2024This application note presents an advanced analytical system for the sensitive detection of trace-level air toxics in humid ambient air samples, in accordance with US EPA Method TO-15A. The cryogen-free preconcentration and thermal desorption approach, coupled to GC-MS, delivers exceptional chromatographic performance even for highly volatile and polar compounds. The system meets the stringent detection limit requirements of the latest air monitoring regulations, with method detection limits as low as 0.7 pptv. This innovative analytical solution provides a robust, cost-effective platform for the reliable quantification of hazardous air pollutants, enabling compliance with regulatory standards.
Continuous, cryogen-free on-line monitoring of PAMS in ambient air using hydrogen carrier gas
November 27th 2024This application note explores an efficient, helium-free method for continuous monitoring of ozone precursors in ambient air, aligned with EPA PAMS requirements. By using hydrogen as the carrier gas, this approach achieves faster run times, stable retention times, and effective separation of volatile organic compounds. A case study from New York City highlights the system's performance in urban air quality monitoring, capturing shifts in pollutant levels during periods of reduced traffic. With remote operability and cryogen-free functionality, this method offers a reliable and sustainable solution for real-time air quality analysis in both urban and remote environments.
Measurement of PFAS in indoor air and investigation of source materials
November 27th 2024This application note demonstrates the use of high through-put automated thermal desorption (TD) coupled with GC-MS/MS for comprehensive PFAS measurement in indoor air. The method enables accurate quantification of a wide range of PFAS compounds, including neutral and volatile species, down to ultra-trace levels. Applying this approach, the study profiled PFAS contamination across different indoor environments, from workplaces to residences. When using sampling chambers to test materials, the PFAS they release into the indoor air can be identified, along with quantifying the emission rate of such releases.
Quantifying trace volatile aromatics in foodstuffs caused by migration from packaging
October 29th 2024This study demonstrates the Centri® sample extraction and enrichment platform’s unique multi-step enrichment feature to enhance the discovery of trace-level, packaging-derived contaminants in food and beverage samples by GC–MS.
PFAS emissions from food contact materials
October 29th 2024Application note outlining the methodology for assessing significant levels of PFAS emissions from food contact materials under typical usage conditions. PFAS were detected across a range of temperatures for the items tested, with concentrations varying from 1 pg/g to over 6000 pg/g.