Found 10480 publications. Showing page 41 of 420:
2000
Analytical procedures for measuring precipitation quality used within the EMEP monitoring program. Analytical chemistry series
2009
Airborne microplastics and nanoplastics (MNPs) are emerging contaminants of global concern due to their persistence, widespread distribution, and potential health impacts. With sizes comparable to PM2.5, they are inhalable and may penetrate deep into the respiratory tract. Their detection and quantification remain challenging because of low environmental concentrations, complex matrices, and particle sizes often below the detection limits of current micro spectroscopic techniques. Pyrolysis–gas chromatography–mass spectrometry (Py-GC-MS) offers a powerful mass-based approach, enabling identification and quantification of polymers regardless of particle size. This review critically examines current methodologies for airborne MNP analysis using Py-GC-MS, including sampling strategies, pretreatment protocols, instrumental parameters, and data modeling approaches. A technological readiness level assessment highlights limited methodological harmonization and insufficient validation, particularly for nanoplastics. Progress toward routine atmospheric monitoring requires standardized workflows, agreed polymer-specific markers, interlaboratory validation, and improved reporting practices to establish Py-GC-MS as a cornerstone technique for airborne MNP assessment.
2026
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2015
2009
2009
Annual calculated concentration fields of SO2 and NOx in Oslo 1960-2000. NILU OR
Annual emission fields of SO2 and NOx are calculated for the main groups traffic, heating and industrial sources in the Oslo area for the years 1960-2000. Concentration fields are calculated with a long-term Gaussian dispersion model (KILDER). The results are compared with measured SO2-values from 1957-63.
2005
2012