Determination of experimental diffusion coefficients of acetic acid and formic acid vapours in air using a passive sampler

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Abstract

Apassive sampling method has been developed for aceticacid and formicacidvapours in ambient air. The procedure involves collection of the vapours in a Palmes diffusion tube (7.1 cm long and 1.1 cm i.d.) and analysis by ion chromatography. Application of Fick's first law of diffusionallows calculation of the acidvapour concentrations. To validate the procedure, the tubes have been exposed to calculated or known concentrations of aceticacid and formicacidvapours, so that the diffusioncoefficients of each acid can be calculated for comparison with theoretical values. Two procedures were used to generate acidvapour concentrations in the range 6–26 mg m−3. Solutions containing calcium chloride and aceticacid or formicacid were placed in desiccators in which replicate diffusion tubes were exposed. The derived diffusioncoefficients of aceticacidand formicacid were 0.110 ± 0.003 and 0.127 ± 0.005 cm2s−1, respectively. An alternative procedure used a 43 dm3 exposure chamber and acidpermeation devices to produce the acidvapour concentrations. The experimentally derived diffusioncoefficients obtained with this system were 0.133 ± 0.007 and 0.120 ± 0.008 cm2s−1 for aceticacid and formicacidvapours, respectively. The theoretical diffusioncoefficients for aceticacid and formic acid vapours are 0.105 and 0.129 cm2 s−1, respectively.
LanguageEnglish
Pages1-10
Number of pages10
JournalAnalytica Chimica Acta
Volume341
DOIs
Publication statusPublished - 1997

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formic acid
Acetic Acid
acetic acid
sampler
Vapors
Air
Fick's laws
Ion chromatography
Calcium Chloride
ion chromatography
air
ambient air
calcium
chloride
Sampling
Acids
acid
sampling
Chromatography
Ions

Keywords

  • passive sampling;
  • ion chromatography
  • acetic acid
  • ambient monitoring
  • formic acid
  • diffusion coefficients
  • palmes tube

Cite this

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title = "Determination of experimental diffusion coefficients of acetic acid and formic acid vapours in air using a passive sampler",
abstract = "Apassive sampling method has been developed for aceticacid and formicacidvapours in ambient air. The procedure involves collection of the vapours in a Palmes diffusion tube (7.1 cm long and 1.1 cm i.d.) and analysis by ion chromatography. Application of Fick's first law of diffusionallows calculation of the acidvapour concentrations. To validate the procedure, the tubes have been exposed to calculated or known concentrations of aceticacid and formicacidvapours, so that the diffusioncoefficients of each acid can be calculated for comparison with theoretical values. Two procedures were used to generate acidvapour concentrations in the range 6–26 mg m−3. Solutions containing calcium chloride and aceticacid or formicacid were placed in desiccators in which replicate diffusion tubes were exposed. The derived diffusioncoefficients of aceticacidand formicacid were 0.110 ± 0.003 and 0.127 ± 0.005 cm2s−1, respectively. An alternative procedure used a 43 dm3 exposure chamber and acidpermeation devices to produce the acidvapour concentrations. The experimentally derived diffusioncoefficients obtained with this system were 0.133 ± 0.007 and 0.120 ± 0.008 cm2s−1 for aceticacid and formicacidvapours, respectively. The theoretical diffusioncoefficients for aceticacid and formic acid vapours are 0.105 and 0.129 cm2 s−1, respectively.",
keywords = "passive sampling; , ion chromatography, acetic acid, ambient monitoring, formic acid , diffusion coefficients , palmes tube",
author = "Lorraine Gibson and David Littlejohn",
year = "1997",
doi = "10.1016/S0003-2670(96)00566-1",
language = "English",
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journal = "Analytica Chimica Acta",
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TY - JOUR

T1 - Determination of experimental diffusion coefficients of acetic acid and formic acid vapours in air using a passive sampler

AU - Gibson, Lorraine

AU - Littlejohn, David

PY - 1997

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N2 - Apassive sampling method has been developed for aceticacid and formicacidvapours in ambient air. The procedure involves collection of the vapours in a Palmes diffusion tube (7.1 cm long and 1.1 cm i.d.) and analysis by ion chromatography. Application of Fick's first law of diffusionallows calculation of the acidvapour concentrations. To validate the procedure, the tubes have been exposed to calculated or known concentrations of aceticacid and formicacidvapours, so that the diffusioncoefficients of each acid can be calculated for comparison with theoretical values. Two procedures were used to generate acidvapour concentrations in the range 6–26 mg m−3. Solutions containing calcium chloride and aceticacid or formicacid were placed in desiccators in which replicate diffusion tubes were exposed. The derived diffusioncoefficients of aceticacidand formicacid were 0.110 ± 0.003 and 0.127 ± 0.005 cm2s−1, respectively. An alternative procedure used a 43 dm3 exposure chamber and acidpermeation devices to produce the acidvapour concentrations. The experimentally derived diffusioncoefficients obtained with this system were 0.133 ± 0.007 and 0.120 ± 0.008 cm2s−1 for aceticacid and formicacidvapours, respectively. The theoretical diffusioncoefficients for aceticacid and formic acid vapours are 0.105 and 0.129 cm2 s−1, respectively.

AB - Apassive sampling method has been developed for aceticacid and formicacidvapours in ambient air. The procedure involves collection of the vapours in a Palmes diffusion tube (7.1 cm long and 1.1 cm i.d.) and analysis by ion chromatography. Application of Fick's first law of diffusionallows calculation of the acidvapour concentrations. To validate the procedure, the tubes have been exposed to calculated or known concentrations of aceticacid and formicacidvapours, so that the diffusioncoefficients of each acid can be calculated for comparison with theoretical values. Two procedures were used to generate acidvapour concentrations in the range 6–26 mg m−3. Solutions containing calcium chloride and aceticacid or formicacid were placed in desiccators in which replicate diffusion tubes were exposed. The derived diffusioncoefficients of aceticacidand formicacid were 0.110 ± 0.003 and 0.127 ± 0.005 cm2s−1, respectively. An alternative procedure used a 43 dm3 exposure chamber and acidpermeation devices to produce the acidvapour concentrations. The experimentally derived diffusioncoefficients obtained with this system were 0.133 ± 0.007 and 0.120 ± 0.008 cm2s−1 for aceticacid and formicacidvapours, respectively. The theoretical diffusioncoefficients for aceticacid and formic acid vapours are 0.105 and 0.129 cm2 s−1, respectively.

KW - passive sampling;

KW - ion chromatography

KW - acetic acid

KW - ambient monitoring

KW - formic acid

KW - diffusion coefficients

KW - palmes tube

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