Intercomparison of formaldehyde measurements in the tropical atmosphere

Trapp, D.; Serves, Claes de

doi:10.1016/1352-2310(95)00255-w

Cited by 33 publications

(13 citation statements)

References 12 publications

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“…Waters SepPak C cartridges were coated with a DNPH solution one to three days prior to their use in the "eld, according to the method of Trapp and de Serves (1995). Samples were collected at a nominal #ow rate of 1.2 l min\.…”

Section: Carbonyl Measurementsmentioning

confidence: 99%

Measurement and analysis of atmospheric concentrations of isoprene and its reaction products in central Texas

Wiedinmyer

Friedfeld

Baugh

et al. 2001

Atmospheric Environment

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Section: Carbonyl Measurementsmentioning

confidence: 99%

Measurement and analysis of atmospheric concentrations of isoprene and its reaction products in central Texas

Wiedinmyer

Friedfeld

Baugh

et al. 2001

Atmospheric Environment

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“…-A study carried out at low formaldehyde concentrations of below 2 ppbv is reported by Trapp and de Serves (1995), who compared results from Hantzsch and DNPH-cartridges technique taken in the tropics. The slope of the regression line was close to unity (b=1.02) and the coefficient of determination between the two techniques was r 2 =0.80 (r=0.89).…”

Section: Introductionmentioning

confidence: 99%

Intercomparison of four different in-situ techniques for ambient formaldehyde measurements in urban air

et al. 2005

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Abstract.Results from an intercomparison of several currently used in-situ techniques for the measurement of atmospheric formaldehyde (CH 2 O) are presented. The measurements were carried out at Bresso, an urban site in the periphery of Milan (Italy) as part of the FORMAT-I field campaign. Eight instruments were employed by six independent research groups using four different techniques: Differential Optical Absorption Spectroscopy (DOAS), Fourier Transform Infra Red (FTIR) interferometry, the fluorimetric Hantzsch reaction technique (five instruments) and a chromatographic technique employing C18-DNPH-cartridges (2,4-dinitrophenylhydrazine). White type multi-reflection systems were employed for the optical techniques in order to avoid spatial CH 2 O gradients and ensure the sampling of nearly the same air mass by all instruments. Between 23 and 31 July 2002, up to 13 ppbv of CH 2 O were observed. The concentrations lay well above the detection limits of all instruments. The formaldehyde concentrations determined with DOAS, FTIR and the Hantzsch instruments were found to agree within ±11%, with the exception of one Hantzsch instrument, which gave systematically higher values. The two hour integrated samples by DNPH yielded up to 25% lower concentrations than the data of the continuously measuring instruments averaged over the same time period. TheCorrespondence to: C. Hak (claudia.hak@iup.uni-heidelberg.de) consistency between the DOAS and the Hantzsch method was better than during previous intercomparisons in ambient air with slopes of the regression line not significantly differing from one. The differences between the individual Hantzsch instruments could be attributed in part to the calibration standards used. Possible systematic errors of the methods are discussed.

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“…Despite its enormous dimensions, little is known about the release of VOC species from the Amazonian rainforest, or any tropical rainforest. There have been a few studies of oxygenated VOC species (Andreae et al, 1988;Khare et al, 1999;Sanhueza and Andreae, 1991;Sanhueza et al, 1996;Trapp and Deserves, 1995) as well as a small number of publications dealing with isoprenoids (Rasmussen and Khalil, 1988;Zimmerman et al, 1988;Helmig et al, 1998. ) Isoprenoid emissions have been studied in a few other tropical forest regions including central Africa and central America (Lerdau and Keller, 1997;Klinger et al, 1998;Keller and Lerdau, 1999;Guenther et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric volatile organic compounds (VOC) at a remote tropical forest site in central Amazonia

Kesselmeier

Kühn

Wolf

et al. 2000

Atmospheric Environment

174

104

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According to recent assessments, tropical woodlands contribute about half of all global natural non-methane volatile organic compound (VOC) emissions. Large uncertainties exist especially about #uxes of compounds other than isoprene and monoterpenes. During the Large-Scale Biosphere/Atmosphere Experiment in Amazonia } Cooperative LBA Airborne Regional Experiment 1998 (LBA-CLAIRE-98) campaign, we measured the atmospheric mixing ratios of di!erent species of VOC at a ground station at Balbina, Amazonia. The station was located 100 km north of Manaus, SE of the Balbina reservoir, with 200}1000 km of pristine forest in the prevailing wind directions. Sampling methods included DNPH-coated cartridges for carbonyls and cartridges "lled with graphitic carbons of di!erent surface characteristics for other VOCs. The most prominent VOC species present in air were formaldehyde and isoprene, each up to several ppb. Concentrations of methylvinyl ketone as well as methacroleine, both oxidation products of isoprene, were relatively low, indicating a very low oxidation capacity in the lower atmospheric boundary layer, which is in agreement with a daily ozone maximum of (20 ppb. Total monoterpene concentration was below 1 ppb. We detected only very low amounts of VOC species, such as benzene, deriving exclusively from anthropogenic sources.

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Intercomparison of formaldehyde measurements in the tropical atmosphere

Cited by 33 publications

References 12 publications

Measurement and analysis of atmospheric concentrations of isoprene and its reaction products in central Texas

Measurement and analysis of atmospheric concentrations of isoprene and its reaction products in central Texas

Intercomparison of four different in-situ techniques for ambient formaldehyde measurements in urban air

Atmospheric volatile organic compounds (VOC) at a remote tropical forest site in central Amazonia

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