Preliminary study of the determination of ambient carbonyls in Xalapa City, Veracruz, Mexico

Báez, A.; Padilla, Hugo; Cervantes, José Gabriel González; Pereyra, Damien; Torres, Marco; Garcı́a, Rocı́o; Bélmont, R.

doi:10.1016/s1352-2310(00)00475-1

Cited by 34 publications

(16 citation statements)

References 16 publications

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“…Other investigations reported similar amounts from cartridge blank levels. [20][21][22] The detection limit of the sampling method was defined as three times the standard deviation in field blanks. The average blank contamination found in field blanks corresponds to the nominal sampling volumes of 792 and 1584 L and the results provide the limits of detection (LOD) for FA of 0.07 and 0.13 ppbv, for AA 0.10 and 0.32 ppbv (24 and 12 h sampling, respectively).…”

Section: Analytical Methodologymentioning

confidence: 99%

“…The air inlet was located 5 m above ground level. The atmospheric air samplings at the Center site were collected during summer (January 29-February 14) and winter (July [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]2002). The sampling system was placed 3.0 meters above ground level and 2.5 meters far from the nearest street.…”

Section: Sampling Of Aldehydesmentioning

confidence: 99%

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Comparison of rural and urban atmospheric aldehydes in Londrina, Brazil

Pinto¹,

Solci²

2007

J. Braz. Chem. Soc.

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Os níveis ambientais de formaldeído e acetaldeído foram medidos em três locais na cidade de Londrina: na estação central de ônibus urbano, no centro (perfis diurno e noturno) e em área rural, no verão e inverno de 2002. Os aldeídos foram coletados em cartuchos Sep-Pak revestidos com 2,4-DNPH e analisados por CLAE/AFD. Na estação central as razões de mistura de formaldeído e acetaldeído, estiveram, respectivamente, na faixa de 6,17 a 10,43 ppbv e 0,49 a 2,12 ppbv. No centro, durante o verão, os níveis do formaldeído variaram de 2,07 a 5,65 ppbv e do acetaldeído variaram de 1,05 a 5,06 ppbv. Durante o inverno, as concentrações diurnas de formaldeído e acetaldeído foram mais elevadas do que as noturnas. As razões de mistura do formaldeído e acetaldeído variaram de 3,24 a 9,46 ppbv e 2,81 a 10,83 ppbv, respectivamente. Na área rural as razões de mistura de formaldeído e acetaldeído variaram de 0,64 a 1,41 ppbv e 0,10 a 0,87 ppbv, respectivamente. As razões de acetaldeído/formaldeído foram comparadas com valores obtidos em outras cidades brasileiras.Ambiental levels of formaldehyde and acetaldehyde were measured at three sites in the city of Londrina: at the central bus station, downtown (night and day profiles) and in a rural area, during the summer and winter seasons of 2002. Atmospheric aldehydes were collected using C18 Sep-Pak cartridges coated with 2,4-DNPH and analyzed by HPLC-DAD. At the central bus station, the measured mixing atios for formaldehyde and acetaldehyde ranged, respectively, from 6.17 to 10.43 ppbv and from 0.49 to 2.12 ppbv. Downtown, during the summer, formaldehyde levels ranged from 2.07 to 5.65 ppbv, and acetaldehyde levels ranged from 1.05 to 5.06 ppbv. During the winter, the daytime concentrations for formaldehyde and acetaldehyde were higher than nighttime levels. Formaldehyde and acetaldehyde mixing ratios ranged from 3.24 to 9.46 ppbv and from 2.81 to 10.83 ppbv, respectively. At the rural site, formaldehyde and acetaldehyde mixing ratios ranged from 0.64 to 1.41 ppbv and from 0.10 to 0.87 ppbv, respectively. The acetaldehyde/formaldehyde ratios were compared with values from other Brazilian cities.

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Section: Analytical Methodologymentioning

confidence: 99%

Section: Sampling Of Aldehydesmentioning

confidence: 99%

Comparison of rural and urban atmospheric aldehydes in Londrina, Brazil

Pinto¹,

Solci²

2007

J. Braz. Chem. Soc.

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“…Carbonyl compounds and BTEX (benzene, toluene, ethylbenzene, m,p-xylene and o-xylene) are two important classes of the major organic pollutants in the urban air, and automobile exhaust has been recognized to be their dominant primary source (Baez et al, 2001;Larry et al, 1996;Liu et al, 2009a;Dutta et al, 2009). In addition, photochemical reactions of volatile organic compounds (VOCs) also make great contribution to atmospheric carbonyls concentrations in the urban areas (Larry et al, 1996;Grosjean, 1982;Carlier et al, 1986;Aschmann et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing

Zhang

Peng

et al. 2012

Atmospheric Environment

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“…This behavior results in higher levels of acetaldehyde than those registered for formaldehyde (lower formaldehyde/acetaldehyde ratios). It is known that formaldehyde is more associated with gasoline engine emissions than acetaldehyde [61]. Acetaldehyde is associated with other sources beyond vehicular traffic emissions, including restaurant emissions, area sources, and stationary emissions [62].…”

Section: Formaldehyde/acetaldehyde Ratiosmentioning

confidence: 99%

Atmospheric Levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, Mexico: Source Implications and Health Risk

Bretón

Kahl

et al. 2017

Atmosphere

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Atmospheric benzene and carbonyls were studied in San Nicolas de los Garza, Nuevo Leon, during 2011 and 2012. The relative abundance for measured VOCs was the following: formaldehyde (9.06 µg m −3 ) > acetaldehyde (8.06 µg m −3 ) > benzene (0.65 µg m −3 ). All measured VOCs had a clear seasonal trend with higher values of concentration during summer. Benzene and formaldehyde had a marked diurnal trend with the highest levels during morning, whereas acetaldehyde did not show a clear diurnal pattern. Meteorological analysis showed that the dominant winds came from NNE and ENE, suggesting that sources located in these directions contribute to the VOC levels. Principal component analysis (PCA) analysis revealed that photochemical activity influenced benzene and carbonyl levels during summer and that benzene was associated with vehicular traffic emissions during autumn and winter, showing good correlation with CO. Meteorological data showed that measured VOCs were influenced by regional sources. A health risk assessment showed that local exposure to carbonyls and benzene exceeded 1 × 10 −6 for integrated lifetime cancer risk. People living in San Nicolas de los Garza, thus, have a probable risk of suffering cancer in their lifetime. It is, therefore, necessary to improve environmental policies for controlling VOC levels in this area.

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Preliminary study of the determination of ambient carbonyls in Xalapa City, Veracruz, Mexico

Cited by 34 publications

References 16 publications

Comparison of rural and urban atmospheric aldehydes in Londrina, Brazil

Comparison of rural and urban atmospheric aldehydes in Londrina, Brazil

Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing

Atmospheric Levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, Mexico: Source Implications and Health Risk

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