Direct determination of semi-volatile organic compounds with sorbent-coated diffusion denuders

Advances in Integrated and Continuous Measurements for Particle Mass and Chemical Composition

“…[192][193][194][195][196][197][198][199][200][201] Solomon et al 31 reported variations of 20 -50% for OC and 20 -200% for EC using 11 filter samplers and four analytical protocols (Table 16). Subramanian et al 48 and Chow et al 40 examined organic artifacts by placing a backup quartz-fiber filter behind the front Teflon-membrane (QBT) or quartz-fiber (QBQ) filter.…”

Comparison of Sampling Methods for Semi-Volatile Organic Carbon Associated with PM2.5

“…The two ne particle channels of each VAPS were con gured in most of these experiments (as shown in Figure 1) with two XAD-coated annular denuders designed speci cally for the VAPS to remove gas phase SVOC that might otherwise be collected, along with particles by the lter that follows the denuder. The XAD-coated glass denuder was downsized in length from that used in the IOGAPS (Gundel and Lane 1998) to t the case of the VAPS. The denuder was an 8 channel glass denuder manufactured by URG Inc. with 0.1 cm annuli and an outside diameter of 5.2 cm.…”

“…The IOGAPS and related samplers (Gundel and Lane 1999;Kamens et al 1999) can provide more accurate measurements of the concentrations of the gas and particulate phases of SVOC than conventional ltersorbent samplers. The improvement in accuracy depends on the vapor pressure of the SVOC, as shown for the polycyclic aromatic compounds (PAH) (Lane and Gundel 1996;Gundel and Lane 1998) as well as pesticides and halogenated species , and ranges from zero to 100%. Recently, the XAD annular denuder used in the IOGAPS has been redesigned for application in the Versatile Air Pollution Sampler (VAPS) and other PM 2:5 speciation samplers (Solomon et al 1999) where thermal analysis was used to determine organic and elemental carbon.…”

Measurement of Fine Particulate Matter Nonvolatile and Semi-Volatile Organic Material with the Sunset Laboratory Carbon Aerosol Monitor

“…Some of these diffusion denuder samplers were developed to measure specific organic compounds. 6,7 The Particle Concentrator-Brigham Young University Organic Sampling System (PC-BOSS) 4 and Real-Time Ambient Mass Sampler (RAMS) 5 were developed to measure total SVOM. The application of these samplers to the study of atmospheric chemistry in urban environments has shown that a substantial fraction of the fine particulate matter in these environments is SVOM.…”