WebEastern Oklahoma County Technology Center does not discriminate on the basis of race, color, national origin, sex/gender, age, disability, or veteran status in its … WebApr 1, 2024 · Radiocarbon (14 C) analysis is a unique tool that can be used to directly apportion organic carbon (OC) and elemental carbon (EC) into fossil and non-fossil fractions.In this study, a coupled carbon analyzer and high-vacuum setup was established to collect atmospheric OC and EC. We thoroughly investigated the correlations between 14 …
Evaluation of the Semi-Continuous OCEC analyzer performance …
WebDec 17, 2013 · The methods are based on that low-volatility EC is not liberated in an inert atmosphere under temperatures >350°C; this allows the more volatile organic carbon (OC) to be separated from EC. Typically two phases of heating are implemented on aerosol particles collected on filters. First, OC evolves in inert atmosphere, where pyrolysis may … WebFeb 6, 2016 · OC and EC exhibited similar seasonal patterns, with the highest concentrations in spring, possibly due to the influence of biomass burning in south and southeast Asia. The mass size distributions of OC and EC were bimodal in all the sampling seasons, each with a dominant peak in the fine mode of 0.4–0.7 μm and a coarse peak … the key 1984
EC OF OC - GuideStar Profile
WebEC1, EC2, and EC3 subfractions. The volatilized EC is swept over a hot oxidizer and converted to CO 2, the same as OC. 2.4 Pyrolysis can happen during the OC analysis by charring of OC compounds to EC. To avoid underestimation of OC and overestimation of EC due to pyrolyzed OC (OCPyro), it is necessary to make a correction for the pyrolysis. WebOct 31, 2015 · The average OC/EC ratio was 2.49 and there was a good correlation among EC, OC, and SO42- except for July and August : r= 0.54 (EC and SO42-, 0.45 (OC and SO42-), 0.71 (EC and OC) Read more Article WebAbout Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ... the key accessibility plan