Measurement of formic acid, acetic acid, formaldehyde and acetaldehyde in the atmosphere by ion chromatography

Shigeru Tanaka, Masaru Iguchi, Kazuo Yamanaka, Tomoyuki Yamada, Naoto Nakao, Yoshikazu Hashimoto

Research output: Contribution to journalArticle

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Abstract

A method for the determination of formic acid, acetic acid, formaldehyde and acetaldehyde in the atmosphere by ion chromatography was investigated. These gases were collected by using two bubblers in series filled with 50 ml distilled water as a trapping solution. The collection efficiencies of the gases by this sampling system were almost 100% at an air flow rate 5 1/min for 4 h in the field measurement. Formic acid and acetic acid collected with distilled water were directly analyzed by ion chromatography. 0.005 M Na2B4O7 was suitable eluent for the ion chromatographic analysis of formate and acetate ions. It was possible to obtain good separation of formate and acetate ions and complete the analysis within 8 min by using 0.005 M Na2B4O7 eluent. Formaldehyde and acetaldehyde collected with distilled water could not be directly determined by ion chromatography with a conductimetric detector. It is therefore necessary to oxidize these aldehydes in the sample solution to formate and acetate for ion chromatographic analysis. The complete oxidation of formaldehyde and acetaldehyde to formate and acetate could be achieved by adding 5 ml of 1% H2O2 and 5 ml of 1 M NH4OH to a 40 ml sample solution, no loss of formate and acetate by the addition was observed. The concentration column was used for the analysis of samples at lower concentration levels. The relative standard deviations of 0.5 ppm formate and acetate determinations by the concentration column were 3~5%, and the detection limits were 0.005 ppm for formate and 0.01 ppm for acetate for a 5 ml injection volume. The measurements of the above gases in the atmosphere were done at two locations (Hiyoshi, Yokohama and Shiroganedai, Tokyo, from April to December, 1985) by using this method. The concentration range was l.5~7.5 μg/m3 for formic acid, 18.8~35.3 μg/m3 for acetic acid, 2.9~18 μg/m3 for formaldehyde and 5.3~ 18.8 μg/m3 for acetaldehyde, respectively. For a 1.2 m3 air sampling volume, the detection limits of this method were 0.2 μg/m3 for formic acid and formaldehyde and 0.4μg/m3 for acetic acid and acetaldehyde.

Original languageEnglish
Pages (from-to)12-17
Number of pages6
JournalBunseki Kagaku
Volume36
Issue number1
DOIs
Publication statusPublished - 1987

Fingerprint

formic acid
Ion chromatography
Acetaldehyde
Acetic Acid
Formaldehyde
Acetates
Chromatographic analysis
Ions
Gases
Water
Sampling

Keywords

  • acetic acid
  • collection by two bubblers in series contained with distilled water
  • formaldehyde and acetaldehyde in the atmosphere
  • ion chromatographic analysis of formate and acetate ions
  • measurement of formic acid
  • oxidation of aldehyde to carbonic acid by hydrogen peroxide

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Measurement of formic acid, acetic acid, formaldehyde and acetaldehyde in the atmosphere by ion chromatography. / Tanaka, Shigeru; Iguchi, Masaru; Yamanaka, Kazuo; Yamada, Tomoyuki; Nakao, Naoto; Hashimoto, Yoshikazu.

In: Bunseki Kagaku, Vol. 36, No. 1, 1987, p. 12-17.

Research output: Contribution to journalArticle

Tanaka, Shigeru ; Iguchi, Masaru ; Yamanaka, Kazuo ; Yamada, Tomoyuki ; Nakao, Naoto ; Hashimoto, Yoshikazu. / Measurement of formic acid, acetic acid, formaldehyde and acetaldehyde in the atmosphere by ion chromatography. In: Bunseki Kagaku. 1987 ; Vol. 36, No. 1. pp. 12-17.
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AU - Nakao, Naoto

AU - Hashimoto, Yoshikazu

PY - 1987

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N2 - A method for the determination of formic acid, acetic acid, formaldehyde and acetaldehyde in the atmosphere by ion chromatography was investigated. These gases were collected by using two bubblers in series filled with 50 ml distilled water as a trapping solution. The collection efficiencies of the gases by this sampling system were almost 100% at an air flow rate 5 1/min for 4 h in the field measurement. Formic acid and acetic acid collected with distilled water were directly analyzed by ion chromatography. 0.005 M Na2B4O7 was suitable eluent for the ion chromatographic analysis of formate and acetate ions. It was possible to obtain good separation of formate and acetate ions and complete the analysis within 8 min by using 0.005 M Na2B4O7 eluent. Formaldehyde and acetaldehyde collected with distilled water could not be directly determined by ion chromatography with a conductimetric detector. It is therefore necessary to oxidize these aldehydes in the sample solution to formate and acetate for ion chromatographic analysis. The complete oxidation of formaldehyde and acetaldehyde to formate and acetate could be achieved by adding 5 ml of 1% H2O2 and 5 ml of 1 M NH4OH to a 40 ml sample solution, no loss of formate and acetate by the addition was observed. The concentration column was used for the analysis of samples at lower concentration levels. The relative standard deviations of 0.5 ppm formate and acetate determinations by the concentration column were 3~5%, and the detection limits were 0.005 ppm for formate and 0.01 ppm for acetate for a 5 ml injection volume. The measurements of the above gases in the atmosphere were done at two locations (Hiyoshi, Yokohama and Shiroganedai, Tokyo, from April to December, 1985) by using this method. The concentration range was l.5~7.5 μg/m3 for formic acid, 18.8~35.3 μg/m3 for acetic acid, 2.9~18 μg/m3 for formaldehyde and 5.3~ 18.8 μg/m3 for acetaldehyde, respectively. For a 1.2 m3 air sampling volume, the detection limits of this method were 0.2 μg/m3 for formic acid and formaldehyde and 0.4μg/m3 for acetic acid and acetaldehyde.

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