The new instrument using a TC–BC (total carbon–black carbon) method for the online measurement of carbonaceous aerosolsRigler, Martin (Avtor)
Drinovec, Luka (Avtor)
Lavrič, Gašper (Avtor)
Vlachou, Anastasia (Avtor)
Prévôt, André S. H. (Avtor)
Jaffrezo, Jean-Luc (Avtor)
STAVROULAS, IASONAS (Avtor)
Sciare, Jean (Avtor)
Burger, Judita (Avtor)
Krajnc, Irena (Avtor)
Turšič, Janja (Avtor)
Hansen, Anthony D. A. (Avtor)
Močnik, Griša (Avtor)
total carbonaerooslblack carboncarbonaceous matterWe present a newly developed total carbon analyzer (TCA08) and a method for online speciation of carbonaceous aerosol with a high time resolution. The total carbon content is determined by flash heating of a sample collected on a quartz-fiber filter with a time base between 20 min and 24 h. The limit of detection is approximately 0.3 µg C, which corresponds to a concentration of 0.3 µg C m−3 at a sample flow rate of 16.7 L min−1 and a 1 h sampling time base. The concentration of particulate equivalent organic carbon (OC) is determined by subtracting black carbon concentration, concurrently measured optically by an Aethalometer®, from the total carbon concentration measured by the TCA08. The combination of the TCA08 and Aethalometer (AE33) is an easy-to-deploy and low-maintenance continuous measurement technique for the high-time-resolution determination of equivalent organic and elemental carbon (EC) in different particulate matter size fractions, which avoids pyrolytic correction and the need for high-purity compressed gases. The performance of this online method relative to the standardized off-line thermo-optical OC–EC method and respective instruments was evaluated during a winter field campaign at an urban background location in Ljubljana, Slovenia. The organic-matter-to-organic-carbon ratio obtained from the comparison with an aerosol chemical speciation monitor (ACSM) was OM/OC=1.8, in the expected range.20202020-08-17 12:55:07Delo ni kategorizirano5689COBISS_ID: 25335555DOI: 10.5194/amt-13-4333-2020NUK URN: URN:SI:UNG:REP:IWRINC8Tsl