Experimental testing of an annular denuder and filter system to measure gas–particle partitioning of semivolatile bifunctional carbonyls in the atmosphere

Positive sampling artifact of carbonaceous aerosols and its influence on the thermal-optical split of OC/EC

“…A critical review of the organic denuder approach has been performed by Cheng et al (2009). More recently, Ortiz et al (2006Ortiz et al ( , 2009 hydroxylamine (PF-BHA) coated denuder and PFBHA impregnated quartz filter to determine the phase distribution of bi-functional carbonyls.…”

Characterization of Particulate-Phase High Molecular Weight Mono-Carbonyls (C# > 5) and Dicarbonyls in Urban Atmosphere of Xi’an, China

“…However, in the particulate-phase, the ambient concentrations of glyoxal and methylglyoxal ranged from tens to hundreds of ng/m 3 . Consistent distributions of dicarbonyls have been observed in many cities (Kawamura et al, 1996;Wang et al, 2002;Kawamura and Yasui, 2005;Li and Yu, 2005;García-alonso et al, 2006;Ho et al, 2007;Ortiz et al, 2009;Mu et al, 2010). The concentrations of targeted carbonyls in PM 2.5 are compared in Table 4, but high molecular weight carbonyls (C# > 5) are rarely studied and reported, so more attention has been paid to the dicarbonyls.…”

Atmospheric Concentrations of Semivolatile Bifunctional Carbonyl Compounds and the Contribution from Motor Vehicles

“…Coarse particles were removed with a cyclone (URG-2000-30EN) (Dp¤2.5 μm, 50% cut-off point at a flow rate of 10 L min -1 ) set at the inlet of the system. The system details are described in delete elsewhere (Ortiz et al, 2009). The extraction efficiencies in the gaseous phase ranged from 82% for glycolaldehyde to 93% for glyoxal.…”

“…Carbonyl compounds have been measured in the rural (DiGangi et al, 2012), forestal (Matsunaga et al, 2004), suburban (Ortiz et al, 2009) and urban atmosphere (Volkamer et al, 2005) near busy roads (Destaillats et al, 2002), having been found in such sites, make carbonyls to be taken as ubiquitous in the atmosphere and therefore of primary importance. Additionally their mutagenic and carcinogenic properties make them a potential risk for human health.…”