Air Particle Measurement

This digital document is an article from American Journal of Environmental Sciences, published by Science Publications on October 1, 2008. The length of the article is 6472 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.From the author: Key words: [PM.sub.10] concentrations, multiple linear regression, principal component regression, independent component regression, quantile regression, partial least squares regressionCitation DetailsTitle: Prediction of the daily mean [PM.sub.10] concentrations using linear models.(Technical report)Author: J.C.M. PiresPublication: American Journal of Environmental Sciences (Magazine/Journal)Date: October 1, 2008Publisher: Science PublicationsVolume: 4 Issue: 5 Page: 445(9)Article Type: Technical reportDistributed by Gale, a part of Cengage Learning

Published on: 2008-10-01 Released on: 2008-10-21 Format: HTML Binding: Digital 22 pages

Excerpt. © Reprinted by permission. All rights reserved. INTRODUCTION Atmospheric particulate matter is made up of solid and liquid particles suspended in the atmosphere. They are emitted by: (i) natural (volcanic eruptions, seismic activity, forest fires, winds of great intensity or natural particle transport from the dry regions); and (ii) anthropogenic sources (all types of combustion and some industrial processes). In Europe, particulate matter is one of the most important air pollutants responsible for loss of human health (1). In the last decade, several studies about health effects of particulate matter were published (2-5). Long exposure to [PM.sub.10] (particles with diameter smaller than 10 [micro]m) and to [PM.sub.2.5] (particles with diameter smaller than 2.5 [micro]m) has been associated with...

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on May 1, 2004. The length of the article is 8176 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Measurement and analysis of the relationship between ammonia, acid gases, and fine particles in eastern North Carolina.(Technical Paper)Author: Bok Haeng BaekPublication: Journal of the Air & Waste Management Association (Refereed)Date: May 1, 2004Publisher: Air and Waste Management AssociationVolume: 54 Issue: 5 Page: 623(11)Distributed by Thomson Gale

Published on: 2004-05-01 Released on: 2005-07-31 Format: HTML Binding: Digital 28 pages

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: A common method of sampling semivolatile organic compounds (SVOCs) is to pull air through a filter to collect the particulate fraction followed by a gas-trapping sorbent (e.g. polyurethane foam or XAD resin) to collect the vapour fraction. This sampling method is prone to artefacts that may misrepresent the particle/gas distribution due to volatilisation from, and sorption to, the particles collected on the filter and the filter material itself. Such artefacts could be due to temperature variations as well as changes in atmospheric concentrations of sorbing species and in the mass of particles on the filter over the sampling period. Mathematical simulations of the changing equilibrium between particle and gas SVOCs during air sampling show that, in the absence of other artefacts, partition coefficients based on 24-h samples will match those in air at the end of the sampling period under warm conditions as well as cool conditions for the more volatile SVOCs. However, to reflect the average conditions of the sampling period, 24-h samples should be started near one of the two times that the average daily temperature occurs. If conditions are such that the equilibration needs of the collected particles cannot be met at all times during the sampling period, samples should be started at the morning occurrence of the average temperature. For the conditions in a mid-latitude urban area simulated in this study, 24-h samples started in early morning can yield temperature-induced blow-on and blow-off errors in estimated partition coefficients of up to 0.4logK"p units.

Published on: 2006-07-01 Format: HTML Binding: Digital 10 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on August 1, 2007. The length of the article is 5210 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Improving estimation of indoor exposure to inhalable particles for children in the first year of life.(TECHNICAL PAPER)(Clinical report)Author: Stuart L. ShalatPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: August 1, 2007Publisher: Thomson GaleVolume: 57 Issue: 8 Page: 934(6)Article Type: Clinical reportDistributed by Thomson Gale

Published on: 2007-08-01 Released on: 2007-09-05 Format: HTML Binding: Digital 18 pages

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: Studies have suggested that aerosol number concentrations may be better correlated to health effects than mass concentrations so that the high particle number concentrations in the vicinity of freeways raise concerns regarding adverse health effects on people living there. Thus, it is important to understand how particles transport and transform near roadways for regulatory purposes. Driven by different mixing forces, exhaust dilution near roadways usually experiences two distinct dilution stages after being emitted-'tailpipe-to-road' and 'road-to-ambient'. The first stage dilution is induced by traffic-generated turbulence and the dilution ratio usually reaches up to about 1000:1 in around 1-3s; the second stage dilution is mainly dependent on atmospheric turbulence, the additional dilution ratio is usually about 10:1, and the process usually lasts around 3-10min. The aerosol dynamical processes, such as nucleation, condensation and coagulation were qualitatively investigated in the first stage. For the second stage, condensation and dilution were the major mechanisms in altering aerosol size distribution, while coagulation and deposition play minor roles. Based on the analysis, a modeling structure for a mechanistic roadway air quality model is proposed. Our study also indicates that in order to simulate the first stage, 'in-tailpipe' measurement of aerosol size distribution and condensable material concentrations in their original phase states is necessary. The implications for dilution tunnel design are discussed.

Amazon Sales Rank: #8565226 in Books Published on: 2004-12-01 Format: HTML Binding: Digital

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: A comprehensive sampling campaign was carried out around a municipal solid waste incinerator (MSWI) in central Taiwan in order to evaluate the impact of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) emissions on the ambient air and describe their spatial variation of gas-particle partitioning. Stack flue gas samples from the MSWI were also analyzed to investigate the relationship between the source and the impacted sites. Results showed that the PCDD/F emissions from the MSWI were a major source for PCDD/Fs in the ambient air. Moreover, PCDD/Fs in the ambient air tended to be distributed between the gaseous and particulate phases based on molecular weight; the higher chlorinated congener occupied a higher particulate fraction. There was an increase in the proportion of particle-bound PCDD/Fs with increasing distance from the MSWI. This observation supports the assumption that PCDD/Fs emitted were initially more associated with gaseous phase and the gaseous PCDD/Fs would gradually migrate to particles via either adsorption or absorption process. The results obtained were also applied and compared with the subcooled liquid vapor pressure (P"L^0)-based model and with the octanol-air partition coefficients (K"o"a)-based model. These two models were found to be excellent descriptors for the gas-particle partitioning of PCDD/Fs. Regressions for log partition coefficient (K"p) versus log P"L^0 and log K"p versus log K"o"a both demonstrated that PCDD/Fs were approaching equilibrium partitioning with increasing distance from the MSWI in the current study.

Published on: 2004-03-01 Format: HTML Binding: Digital

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: To meet the emission standards that become more and more stringent, the waste incinerators are commonly equipped with various air pollution control devices. Gas/particulate phase distribution of polychlorinated dibenzo-p-doxin and furan (PCDD/F) in stack gas could be much different when different control technologies are applied. This study evaluates PCDD/F congener distributions at the stack gas of a municipal waste incinerator (MWI) and ambient air in northern Taiwan via stack gas and ambient air sampling and analysis. Ambient air samples were taken in the vicinity area of a large-scale MWI for measuring PCDD/F concentrations and partitioning gas/particulate phase from November 1999 through January 2001. Stack gas samples of the MWI were taken during the period of ambient air sampling. The PCDD/F concentrations measured in fall and winter seasons are significantly higher than those measured in summertime. In addition, the results obtained on gas/particulate partitioning of ambient air samples indicate that the particulate-phase PCDD/Fs account for more than 80% of the total concentration. Nevertheless, the gas/particulate partitioning of stack gas PCDD/F sample was completely different from that of the ambient air samples. The gas-phase PCDD/Fs account for more than 85% of the total concentration in MWI stack gas. This study also indicates that as the chlorination level of PCDD/F congeners increases, the percentage of PCDD/Fs existing in gas phase decreases in either ambient air or stack gas of MWI. Furthermore, the temperature in ambient air also affects the percentage of particle-bound dioxins. As the ambient air temperature decreases by 10^oC, the percentage of PCDD/Fs in particulate phase increases around 20%. PCDFs account for about 80% of the I-TEQ concentrations for stack gas and ambient air sample, among them the 2,3,4,7,8-PeCDF is the major contributor, accounting for 30-55% of the total I-TEQ.

Published on: 2004-05-01 Format: HTML Binding: Digital

This digital document is a journal article from Atmospheric Environment, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: We report on an air-pollution monitoring campaign in the urban Kyoto area conducted during December 2003 and January 2004. The method is based on the differential optical absorption spectroscopy (DOAS) using an aviation obstruction light (white flashlight). Three sets of DOAS spectrometers, each consisting of a telescope and a compact charge-coupled device (CCD) spectrometer, were operated to cover the southern part of the city area. Three sites were chosen in the urban Kyoto area, and the average concentrations of NO"2 were measured with optical path lengths of 2.7, 4.1, and 7.1km. The aerosol optical thickness was simultaneously measured for the path length of 2.7km. It is found that the temporal variations of the retrieved amount of the pollution species agree with each other and they are also consistent with concurrent results of the ground sampling measurements.

Format: HTML Binding: Digital

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on November 1, 2006. The length of the article is 8685 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Determining gaseous emission factors and driver's particle exposures during traffic congestion by vehicle-following measurement techniques.Author: U. Wa TangPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: November 1, 2006Publisher: Thomson GaleVolume: 56 Issue: 11 Page: 1532(8)Distributed by Thomson Gale

Published on: 2006-11-01 Released on: 2006-12-14 Format: HTML Binding: Digital 29 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on August 1, 2005. The length of the article is 8179 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Aerosol particle number concentration measurements in five European cities using TSI-3022 condensation particle counter over a three-year period during Health Effects of Air Pollution on Susceptible Subpopulations.(TECHNICAL PAPER)Author: Pasi AaltoPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: August 1, 2005Publisher: Thomson GaleVolume: 55 Issue: 8 Page: 1064(13)Distributed by Thomson Gale

Amazon Sales Rank: #8327637 in Books Published on: 2005-08-01 Released on: 2005-09-19 Format: HTML Binding: Digital 28 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on July 1, 2005. The length of the article is 4977 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Measurement of fine particles in diesel emissions using a real-time aerosol monitor.(TECHNICAL PAPER)Author: Jiping ZhuPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: July 1, 2005Publisher: Thomson GaleVolume: 55 Issue: 7 Page: 978(6)Distributed by Thomson Gale

Published on: 2005-07-01 Released on: 2005-09-19 Format: HTML Binding: Digital 17 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on February 1, 2011. The length of the article is 5596 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Total diesel exhaust particulate length measurements using a modified household smoke alarm ionization chamber.(TECHNICAL PAPER)(Report)Author: Michal Vojtisek-LomPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: February 1, 2011Publisher: Air and Waste Management AssociationVolume: 61 Issue: 2 Page: 126(9)Article Type: ReportDistributed by Gale, a part of Cengage Learning

Published on: 2011-02-01 Released on: 2011-03-04 Format: HTML Binding: Digital 19 pages

Excerpt. © Reprinted by permission. All rights reserved. ABSTRACT To evaluate the effectiveness of various means to combat the negative health effects of ultrafine particles emitted by internal combustion engines, a reliable, low-cost instrument for dynamic measurements of the exhaust emissions of ultrafine particulate matter (PM) is needed. In this study, an ordinary ionization-type building smoke detector was modified to serve as a measuring ionization chamber and utilized for dynamic measurements of PM emissions from diesel engines. When used with diluted exhaust, the readings show an excellent correlation with total particulate length. The instrument worked well with raw and diluted exhaust and with varying emission levels and is well suitable for on-board use.

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on October 1, 2010. The length of the article is 6686 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Theoretical versus observed gas-particle partitioning of carbonyl emissions from motor vehicles.(COMBUSTION AEROSOL 2009)(Report)Author: Jianjun ChenPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: October 1, 2010Publisher: Air and Waste Management AssociationVolume: 60 Issue: 10 Page: 1237(8)Article Type: ReportDistributed by Gale, a part of Cengage Learning

Published on: 2010-10-01 Released on: 2010-11-08 Format: HTML Binding: Digital 23 pages

Excerpt. © Reprinted by permission. All rights reserved. ABSTRACT A state-of-the-science thermodynamic model describing gas-particle absorption processes was used to predict the gas-particle partitioning of mixtures of approximately 60 carbonyl compounds emitted from low-emission gasoline-powered vehicles, three-way catalyst gasoline-powered vehicles, heavy-duty diesel vehicles under the idle-creep condition (HDDV idle), and heavy-duty diesel vehicles under the five-mode test (HDDV 5-mode). Exhaust was diluted by a factor of 120-580 with a residence time of approximately 43 sec. The predicted equilibrium absorption partitioning coefficients differed from the measured partitioning coefficients by several orders of magnitude. Time scales to reach equilibrium in the dilution sampling system were close to the actual residence time during the HDDV 5-mode test and much longer than the actual residence time during the other vehicle tests...

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on March 1, 2010. The length of the article is 7454 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Semicontinuous [PM.sub.2.5] and [PM.sub.10] mass and composition measurements in Lindon, Utah, during winter 2007.(Technical report)Author: Jaron C. HansenPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: March 1, 2010Publisher: Air and Waste Management AssociationVolume: 60 Issue: 3 Page: 346(10)Article Type: Technical reportDistributed by Gale, a part of Cengage Learning

Published on: 2010-03-01 Released on: 2010-04-09 Format: HTML Binding: Digital 25 pages

Excerpt. © Reprinted by permission. All rights reserved. ABSTRACT The U.S. Environmental Protection Agency is promoting the development and application of sampling methods for the semicontinuous determination of fine particulate matter (P[M.sub.2.5], particles with an aerodynamic diameter

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on December 1, 2007. The length of the article is 6665 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Evaluation and comparison of continuous fine particulate matter monitors for measurement of ambient aerosols.(TECHNICAL PAPER)(Technical report)Author: Kunning ZhuPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: December 1, 2007Publisher: Thomson GaleVolume: 57 Issue: 12 Page: 1499(8)Article Type: Technical reportDistributed by Thomson Gale

Published on: 2007-12-01 Released on: 2008-01-12 Format: HTML Binding: Digital 23 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on July 1, 2007. The length of the article is 5193 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Source identifications of airborne fine particles using positive matrix factorization and U.S. Environmental Protection Agency positive matrix factorization.(TECHNICAL PAPER)(Technical report)Author: Eugene KimPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: July 1, 2007Publisher: Thomson GaleVolume: 57 Issue: 7 Page: 811(9)Article Type: Technical reportDistributed by Thomson Gale

Published on: 2007-07-01 Released on: 2007-11-07 Format: HTML Binding: Digital 18 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on July 1, 2002. The length of the article is 8755 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Regional transport and urban contributions to fine particle concentrations in southeastern Canada. (Technical Paper).(Statistical Data Included)Author: Jeffrey R. BrookPublication: Journal of the Air & Waste Management Association (Refereed)Date: July 1, 2002Publisher: Air and Waste Management Association Page: 855(12)Article Type: Statistical Data IncludedDistributed by Thomson Gale

Published on: 2002-07-01 Released on: 2005-07-30 Format: HTML Binding: Digital 30 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on July 1, 2002. The length of the article is 3326 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Particle size relationships at the Fresno Supersite. (Technical Paper).(Statistical Data Included)Author: John G. WatsonPublication: Journal of the Air & Waste Management Association (Refereed)Date: July 1, 2002Publisher: Air and Waste Management Association Page: 822(6)Article Type: Statistical Data IncludedDistributed by Thomson Gale

Published on: 2002-07-01 Released on: 2005-07-30 Format: HTML Binding: Digital 12 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on June 1, 2003. The length of the article is 7347 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: The mobile source effect on curbside 1,3-Butadiene, Benzene, and particle-bound polycyclic aromatic hydrocarbons assessed at a tollbooth. (Technical Paper).Author: Amir SapkotaPublication: Journal of the Air & Waste Management Association (Refereed)Date: June 1, 2003Publisher: Air and Waste Management AssociationVolume: 53 Issue: 6 Page: 740(9)Distributed by Thomson Gale

Published on: 2003-06-01 Released on: 2005-07-31 Format: HTML Binding: Digital 25 pages

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: The relationship between ambient fine particle (PM"2"."5) concentration and children's personal exposure was investigated in Prince George, British Columbia. Repeated personal exposure measures (10 per subject) of 15 children and ambient concentrations at their neighbourhood schools were collected for a 6-week winter period in 2001. PM"2"."5 mass, sulphate (SO"4^2^-) and light absorbing carbon (ABS) were determined for all samples and the relationship between ambient concentration and personal exposure was investigated. Overall, lower particle exposures and a lower personal-ambient regression slope were found for Prince George children compared to results from other longitudinal studies of children. This suggests that in this setting indoor environments may have less influence from ambient sources and greater influence from non-ambient sources. Comparison of personal exposures and ambient concentrations for each individual indicated higher Spearman correlations for SO"4^2^- (median=0.95) and ABS (median=0.73) compared to total PM"2"."5 mass (median=0.55). A large degree of individual variability in the personal-ambient correlation was found for PM"2"."5 mass, while SO"4^2^- showed very consistent results, supporting its use as an indicator of exposure to particulate matter of ambient origin. ABS was slightly more variable than SO"4^2^- due to the influence of non-ambient or very local sources in a low number of samples. The impact of local meteorology was also investigated and inversion conditions were connected to all high ambient levels (>30@mgm^-^3). In addition, associations were found between inversion strength and personal exposure. This finding suggests that reduction of ambient concentrations during stagnant periods would result in lower personal exposure levels. This study highlights the importance of both ambient and non-ambient sources, supports the use of both SO"4^2^- and ABS as tracers of background ambient particle exposure and demonstrates the significant effect of winter meteorology on both outdoor levels and personal exposure in a valley community.

Published on: 2006-04-01 Format: HTML Binding: Digital 19 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on December 1, 2001. The length of the article is 3221 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: A cost-effective weighing chamber for particulate matter filters. (Notebook Paper).Author: Ryan AllenPublication: Journal of the Air & Waste Management Association (Refereed)Date: December 1, 2001Publisher: Air and Waste Management AssociationVolume: 51 Issue: 12 Page: 1650(4)Distributed by Thomson Gale

Published on: 2001-12-01 Released on: 2005-07-28 Format: HTML Binding: Digital 11 pages

This digital document is an article from Journal of the Air & Waste Management Association, published by Thomson Gale on May 1, 2007. The length of the article is 11545 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Real-time measurement of outdoor tobacco smoke particles.(TECHNICAL PAPER)Author: Neil E. KlepeisPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: May 1, 2007Publisher: Thomson GaleVolume: 57 Issue: 5 Page: 522(13)Distributed by Thomson Gale

Amazon Sales Rank: #7703614 in Books Published on: 2007-05-01 Released on: 2007-06-20 Format: HTML Binding: Digital 39 pages

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: A simple numerical experiment demonstrates the potential for a single Tapered Element Oscillating Microbalance (TEOM) to scan sequentially for 5min periods across separate PM10, PM2.5 and PM1 size-selective inlets, to yield data at hourly and daily averaging periods that is little different in accuracy and precision to data from separate measurement systems. This offers the possibility of determining at any site all three particle mass measures at considerably reduced capital cost using one TEOM rather than three TEOMs. Moreover, use of a single TEOM sensor for all three data series would have the significant advantage of eliminating the bias between different instruments inevitably caused by slight differences in calibration and response. Field trials of the idea appear warranted.

Published on: 2004-07-01 Format: HTML Binding: Digital