Development and evaluation of a personal cascade impactor sampler (PCIS)

Misra, Chandan; Singh, Manisha; Shen, Si; Sioutas, Constantinos; Hall, P. M.

doi:10.1016/s0021-8502(02)00055-1

Cited by 194 publications

(148 citation statements)

References 21 publications

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“…Particles are separated in the aerodynamic particle diameter of quasi-ultrafine mode (Dp < 0.25 µm; PM 0.25 ), accumulation mode (0.25-0.5 µm, 0.5-1.0 µm, 1.0-2.5 µm; PM 0.25-2.5 ) and coarse (2.5-10 µm; PM 2.5-10 ). 42,43 The impactors were placed 1.5 m above ground level and particulate matter was collected with Teflon filters (25 and 37 mm diameter). After being weighed, the membranes were immediately frozen and kept in a refrigerator until analysis.…”

Section: Sampling Methodsmentioning

confidence: 99%

Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil

Freitas¹,

Martins

Solci³

2012

J. Braz. Chem. Soc.

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Amostragens simultâneas de material particulado (PM) de 0,25 a 10 mm foram realizadas entre os meses de março e abril de 2007 em área urbana e rural de Londrina (Paraná). Os resultados indicaram que o material particulado fino (PM 2,5 ) representa uma significativa porção da massa de material particulado PM 10 (70 e 67% na área urbana e rural, respectivamente). Ácidos dicarboxílicos foram encontrados em maior concentração respondendo por 78% e 69% da massa de PM 2,5 na área urbana e rural, respectivamente, sendo que o oxalato e succinato foram os mais abundantes. A distribuição de massa do oxalato em área urbana apresentou picos dominantes em 0,25-0,5 µm. A razão de massa de acetato e formato indicou as emissões veiculares primarias como fonte dominante de ácidos carboxílicos em Londrina. Além disso, análises das trajetórias indicaram a ocorrência de transporte de poluentes do estado de São Paulo para a região de estudo.Samplings of atmospheric particulate matter (PM) from 0.25 to 10 µm were performed between the months of March and April 2007, simultaneously in urban and rural areas of Londrina City (Paraná State, Brazil). Results indicated that the fine fraction (PM 2.5 ) represents a significant portion of the PM 10 mass (70 and 67% in urban and rural areas, respectively). Dicarboxylic acids were found in larger concentration, contributing to the PM 2.5 fraction with 78% in urban and 69% in rural areas, being oxalate and succinate the most abundant species. Mass size distribution of oxalate in urban site was presented as the dominant mode, with peaks at 0.25-0.5 µm. Acetate-to-formate mass ratio indicated the primary vehicular emissions as dominant source of carboxylic acids in Londrina. Moreover, backward trajectories indicated the transport of pollutants from São Paulo State to Londrina region.Keywords: size-segregated particulate matter, carboxylic acids, PM 2.5 , urban and rural aerosols IntroductionThe occurrence and abundance of carboxylic acids in atmospheric particulate matter (PM) depend on meteorological conditions and characteristics of the ambient. The carboxylic acids represent a major fraction of the organic acids present in the atmospheric particulate matter. Among them, the oxalic acid has been the main species, followed by succinic and malonic acids. [1][2][3][4][5][6] Mono-and di-carboxylic acids are important groups of organic compounds identified in the atmospheric particles. 7,8 Formic and acetic acids, the dominant species of organic acids in tropospheric aqueous and gaseous phases, are also ubiquitous in aerosol particles. Oxalic acid has been detected as the major fraction of water-soluble organic compounds in urban, rural and even in remote areas. [3][4][5][6] Since carboxylic acids are highly water-soluble, they have the potential to modify the hygroscopic properties of atmospheric particles, including their ambient size and cloud condensation nuclei activity. 9,10 Weak organic acids could contribute ca. 40 and 60% to the free acidity in precipitation in urban and remote areas, respe...

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Section: Sampling Methodsmentioning

confidence: 99%

Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil

Freitas¹,

Martins

Solci³

2012

J. Braz. Chem. Soc.

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“…It Figure S1 and its further description can be found elsewhere (Misra et al, 2002;Sioutas, 2004). To ensure that the particles are separated precisely in these size-bins, the PCIS must be used with a Leland Legacy Sample Pump (SKC Inc., Cat.…”

Section: Instrumentationmentioning

confidence: 99%

“…Teflon is preferred for collecting such particles since this does not interfere with gravimetric analysis and chemical composition (Misra et al, 2002).…”

Section: Instrumentationmentioning

confidence: 99%

Size–segregated particulate matter inside residences of elderly in the Metropolitan Area of São Paulo, Brazil

Segalin

Kumar

Micadei

et al. 2017

Atmospheric Environment

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“…The site is in-between two subway stations and one block north of the main thoroughfare through the neighborhood. One Sioutas personal cascade impactor sampler (PCIS) (Misra et al 2002;Singh et al 2003) was employed operating at 9 Lpm for 24 hours. This sampler separates the PM into five size-fractions (>2.5 µm, 2.5-1 µm, 1-0.5 µm, 0.5-0.25 µm, and <0.25 µm) allowing for size-fractionated chemical-speciation data.…”

Section: Particulate Matter Samplingmentioning

confidence: 99%

Development of a Manganese Speciation Method for Atmospheric Aerosols in Biologically and Environmentally Relevant Fluids

Majestic

Schauer

Shafer

2007

Aerosol Science and Technology

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Because the health effects of manganese are dependent its oxidation-state, we have improved upon oxidation-state resolved methods to quantify soluble manganese in atmospheric aerosols. Two spectrophotometric methods were adapted for measurements in atmospheric aerosols in order to measure total soluble manganese (Mn sol ) and soluble oxidized manganese [Mn(III) and Mn(IV), Mn ox ]. Using the formaldoxime method, we noted a detection limit two orders of magnitude better than past studies using trace-metal clean techniques and a 1 meter path-length spectrophotometric cell. Extractions of co-located aerosol samples were performed in four environmentally or biologically relevant extract solutions and processed for soluble manganese analysis. The quantity of manganese extracted was a strong function of the fluid, and the greatest amount of manganese was extracted in the rain-water surrogate (acetate buffered solution). Mn sol in East St. Louis, IL, USA (6-20% of the total manganese) was less than the Mn sol in aerosols collected in Toronto, ON, Canada (40% of the total). Mn ox was not detected in the PM10 samples collected in East St. Louis, however Mn ox accounted for around 30% of the PM2.5 soluble manganese in Toronto. Mn ox was not detected in the coarse fraction in Toronto, which may imply that soils are not a source of Mn ox at this site. Oxidized manganese was not recoverable from extracts of samples from East St. Louis spiked with 1 µg Mn ox L −1 . This implies that a soluble component of the aerosol is responsible for reduction of oxidized manganese and that the chemical form of manganese in aerosols can quickly change when it comes into contact with a fluid.

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Development and evaluation of a personal cascade impactor sampler (PCIS)

Cited by 194 publications

References 21 publications

Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil

Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil

Size–segregated particulate matter inside residences of elderly in the Metropolitan Area of São Paulo, Brazil

Development of a Manganese Speciation Method for Atmospheric Aerosols in Biologically and Environmentally Relevant Fluids

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