Pah diagnostic ratios
WebJan 25, 2024 · Scatterplots of the four PAH diagnostic ratios selected in this work are shown in Figs. 7 and and8. 8. The Flu/(Flu + Pyr) ratio fell below 0.4 in only a few percent of our samples, ranged from 0.4 to 0.5 in a significant portion of the samples, and exceeded 0.5 in a majority of the samples. WebDec 12, 2015 · The total PAH concentrations (∑ 12 PAH) varied spatially between 8 and 4970 ng/g dry matter (DM). The highest concentrations were measured in soils taken from traffic+barbecue+ residential areas (4970 ng/g DM) and areas with cement (4382 ng/g DM) and iron–steel (4000 ng/g DM) factories.
Pah diagnostic ratios
Did you know?
WebA variety of polycyclic aromatic hydrocarbon (PAH) diagnostic ratios were examined as source apportionment tools in the analysis of a PAH data set associated with … WebPAH Molecular Diagnostic Ratios Applied to Atmospheric Sources: A Critical Evaluation Using Two Decades of Source Inventory and Air Concentration Data from the UK …
WebJun 1, 2024 · In order to investigate the effectiveness of diagnostic ratios in polycyclic aromatic hydrocarbon (PAH) source discrimination, semi-open pyrolysis experiments have been performed on an organic-rich, immature shale from the Winnipegosis Formation in southeastern Saskatchewan, Western Canada Sedimentary Basin. WebJun 29, 2024 · Although molecular diagnostic ratios including Fla/ (Fla + Pyr), BaA/ (BaA + Chr), Ant/ (Phe + Ant) and Ind/ (Ind + BghiP) have been widely used for identifying and assessing the origin of PAHs...
WebDec 20, 2024 · For this study, three specific ratios will be used: (1) the ratio of LPAH/HPAH, where LPAH includes the sum of Nap, Ace1, Ace2, Fl1, Phen, and Ant, and HPAH includes the sum of Fl2, Pyr, BaA, Chr, BbF, BkF, BaP, IP, DahA, and BghiP; (2) the ratio of Phen/Ant, which has been used extensively to distinguish between petrogenic and … WebNov 5, 2024 · To identify PAH sources, a few ratios of PAH species are used. These ratios are widely used to determine PAH sources. These ratios can show the possible sources of PAH emissions. Some of these diagnostic rations are Phe/(Phe + Ant), Flu/(Flu + Pyr), BaA/(BaA + Chr), and BaP/BghiP. PCA reduces PAHs into 2 or 3 PCs.
Both unwashed and washed C+1 needles showed generally higher concentrations … PAH and their molecular diagnostic ratios in airborne particles PM10 collected in Rio … Contamination of sludges from storage chambers indicated a local origin typical … The PAH concentrations obtained in the IB sampling site varied from 0.02 to 16.74 … Combustion of different types of fuel generates different PAH emission … Plot of the diagnostic ratios BaA/CHR vs PER/∑PAH for the sediements … The detailed study of diagnostic ratios suggested a rather uniform mixture of … The relationship between the vapour:particle partition coefficient (K p) … The relative abundances or diagnostic ratios are valid indicators of PAH … A PAH mixture containing naphthalene, acenaphthene, acenaphthylene, …
WebSep 15, 2016 · Pulmonary hypertension is a heterogeneous group of disorders characterized by a mean pulmonary arterial pressure of 25 mm Hg or greater at rest during right heart catheterization. 1 – 4 Patients... butter scene last tangoWebApr 26, 2024 · The PAH diagnostic ratios published by Yunker et al. ( 2002) have been widely used to determine the main emission sources of atmospheric PAHs (Ali-Taleshi et al. 2024b ), although they may be influenced by atmospheric reactions of PAHs and weather conditions (Katsoyiannis et al. 2011 ). butter scented candleWebMar 14, 2024 · Patients suspected of having pulmonary hypertension (PH) undergo extensive diagnostic testing. ... The main PA/ascending aorta diameter ratio ≥1 is also … butters campground ludingtonWebThe sensitivity analysis revealed that PAH ratios of the low molecular weight compounds were less stable, and a site-specific rectification factor was defined as the ratio of the two … butters cartmanWebOct 15, 2011 · Molecular diagnostic ratios (MDRs)-the ratios of defined pairs of individual compounds-have been widely used as markers of different source categories of … cedaredge lodgingWebBackground: Computed tomography (CT) of the aorta and cardiac vessels, which is performed in patients with severe aortic valve stenosis (AS) before transcatheter aortic valve replacement (TAVR), offers the possibility of non-invasive detection of pulmonary hypertension (PH), for example, by determining the diameter of the main pulmonary … cedaredge hsWebAug 22, 2011 · Molecular diagnostic ratios (MDR) of PAHs can provide useful information for source apportionment studies when the atmospheric contaminants are contributed by a few strong sources [22]. The... butters chaos