Partner: École Polytechnique Fédérale de Lausanne; Center of Studies on Air quality and Climate Change, ICEHT- FORTH
PI: Prof. Nenes Athanasios ([email protected])
Operator: Carolina Molina ([email protected])
Brown Carbon (BrC) is defined as the organic aerosols that absorb at near ultraviolet (UV) and short visible wavelengths (300–400 nm). It plays a key role in the global radiative budget, and due to its complex composition, reactive oxygen species production, related to oxidative stress can be attributed to it. To quantify BrC, we use an automated multiport syringe programed to inject a small volume of aerosols water extract into a 1 m liquid waveguide capillary cell (LWCC, World of Precision, UK) connected to an online spectrophotometer (Light source: DH mini, detector: model Flame, OceanOptics, FL, USA). This setup allows the quantification of BrC in low concentrations. This instrument can potentially be used to quantify other detectable components by UV-Vis spectroscopy.