%0 Journal Article %1 Lambe:2010p2679 %A Lambe, Andrew T %A Chacon-Madrid, Heber J %A Nguyen, Ngoc T %A Weitkamp, Emily A %A Kreisberg, Nathan M %A Hering, Susanne V %A Goldstein, Allen H %A Donahue, Neil M %A Robinson, Allen L %D 2010 %J Aerosol Science and Technology %K Apportionment, Emissions, Factorization, Heterogeneous Instrument, Laboratory Makers, Mass, Matrix Measurements Molecular Oxidation, Particles, Positive Source Tracers, %N 2 %P 141--151 %R 10.1080/02786820903447206 %T Organic Aerosol Speciation: Intercomparison of Thermal Desorption Aerosol GC/MS (TAG) and Filter-Based Techniques %U http://www.informaworld.com/smpp/urlmapping?request=%252Fopenurl%253Fgenre%253Darticle%2526doi%253D10%252E1080%252F02786820903447206%2526magic%253Dcrossref%25257C%25257CD404A21C5BB053405B1A640AFFD44AE3 %V 44 %X We compared measurements of organic molecular markers made using a novel Thermal Desorption Aerosol Gas Chromatograph/Mass Spectrometer (TAG) with two offline filter-based methods: solvent extraction GC/MS (SE-GC/MS) and thermal desorption GC/MS (TD-GC/MS). TAG is designed for automated, high time-resolved measurements of organic aerosol speciation. Laboratory and field measurements were performed to compare TAG and filter performance for n-alkanes, n-alkanoic acids, cholesterol, PAHs, and hopanes. Laboratory measurements of model organic aerosol mixtures of known composition were made in the Carnegie Mellon University smog chamber, and field measurements were made in downtown Pittsburgh. There was excellent agreement between techniques for hopanes and several PAHs, which are important markers for motor vehicle emissions. Agreement was also strong for moderately polar and nonpolar species in the high-concentration smog chamber experiments. Poorer agreement between filter and TAG observations was obtained for n-alkanes in ambient measurements. To further investigate the differences in n-alkane performance between these methods, potential matrix effects and internal consistency within the TAG and filter ambient air data sets were examined. We spiked a subset of ambient TAG samples with deuterated internal standards to examine potential matrix effects. Under typical conditions, there was little bias in recovery of deuterated standards. At extreme ambient aerosol levels, however, there were large biases in relative recovery, indicating matrix effects may be important under those conditions. Similar results were observed in laboratory experiments with engine lubricating oil. Applying internal standards in the TAG system would help track and correct for matrix effects influencing compound recovery.

@article{Lambe:2010p2679, abstract = {We compared measurements of organic molecular markers made using a novel Thermal Desorption Aerosol Gas Chromatograph/Mass Spectrometer (TAG) with two offline filter-based methods: solvent extraction GC/MS (SE-GC/MS) and thermal desorption GC/MS (TD-GC/MS). TAG is designed for automated, high time-resolved measurements of organic aerosol speciation. Laboratory and field measurements were performed to compare TAG and filter performance for n-alkanes, n-alkanoic acids, cholesterol, PAHs, and hopanes. Laboratory measurements of model organic aerosol mixtures of known composition were made in the Carnegie Mellon University smog chamber, and field measurements were made in downtown Pittsburgh. There was excellent agreement between techniques for hopanes and several PAHs, which are important markers for motor vehicle emissions. Agreement was also strong for moderately polar and nonpolar species in the high-concentration smog chamber experiments. Poorer agreement between filter and TAG observations was obtained for n-alkanes in ambient measurements. To further investigate the differences in n-alkane performance between these methods, potential matrix effects and internal consistency within the TAG and filter ambient air data sets were examined. We spiked a subset of ambient TAG samples with deuterated internal standards to examine potential matrix effects. Under typical conditions, there was little bias in recovery of deuterated standards. At extreme ambient aerosol levels, however, there were large biases in relative recovery, indicating matrix effects may be important under those conditions. Similar results were observed in laboratory experiments with engine lubricating oil. Applying internal standards in the TAG system would help track and correct for matrix effects influencing compound recovery.}, added-at = {2010-06-22T19:38:37.000+0200}, affiliation = {Carnegie Mellon Univ, Ctr Atmospher Particle Studies, Pittsburgh, PA 15213 USA}, author = {Lambe, Andrew T and Chacon-Madrid, Heber J and Nguyen, Ngoc T and Weitkamp, Emily A and Kreisberg, Nathan M and Hering, Susanne V and Goldstein, Allen H and Donahue, Neil M and Robinson, Allen L}, biburl = {https://www.bibsonomy.org/bibtex/2c1f84eaa91252f1c886e52a70287d326/gsmith}, date-added = {2010-03-29 14:10:33 -0400}, date-modified = {2010-03-29 14:11:25 -0400}, doi = {10.1080/02786820903447206}, interhash = {2bc6e6d2bb7f352cc91e0e68d5db55a8}, intrahash = {c1f84eaa91252f1c886e52a70287d326}, journal = {Aerosol Science and Technology}, keywords = {Apportionment, Emissions, Factorization, Heterogeneous Instrument, Laboratory Makers, Mass, Matrix Measurements Molecular Oxidation, Particles, Positive Source Tracers,}, language = {English}, local-url = {file://localhost/Users/geoffreysmith/Documents/Papers/Aerosol%20Science%20and%20Technology/2010/Aerosol%20Science%20and%20Technology,%2044,%20141-151%202010.pdf}, month = Jan, number = 2, pages = {141--151}, pmid = {000274195900005}, rating = {0}, timestamp = {2010-06-22T19:39:27.000+0200}, title = {Organic Aerosol Speciation: Intercomparison of Thermal Desorption Aerosol GC/MS (TAG) and Filter-Based Techniques}, uri = {papers://E88B624E-D406-46FF-9D95-BB9C1AAE3FDC/Paper/p2679}, url = {http://www.informaworld.com/smpp/urlmapping?request=%252Fopenurl%253Fgenre%253Darticle%2526doi%253D10%252E1080%252F02786820903447206%2526magic%253Dcrossref%25257C%25257CD404A21C5BB053405B1A640AFFD44AE3}, volume = 44, year = 2010 }