TY - JOUR
T1 - Determination of sulfuric acid mist in atmosphere by benzaldehyde extraction and reinjection ion chromatography.
AU - Tanaka, Shigeru
AU - yamanaka, Kazuo
AU - Yamagata, Katsuhiro
AU - Komazaki, Yuichi
AU - Hashimoto, Yoshikazu
PY - 1987
Y1 - 1987
N2 - A method for the determination of sulfuric acid in the atmosphere by ion chromatography was investigated. Sulfuric acid in aerosols collected on a Teflon filter was extracted with benzaldehyde as a selective solvent for sulfuric acid, and then sulfuric acid in benzaldehyde was counterextracted with distilled water for ion chromatography. In the counterextraction, a portion of benzaldehyde dissolved in distilled water, and was rapidly oxidized to benzoic acid. The benzoic acid produced by oxidation of benzaldehyde seriously interfered with the determination of sulfuric acid by ion chromatography due to the overlapping peaks. Various methods such as the reduction with zinc powder, the extraction with benzene, and the cooling were tested for removal of benzoic acid. However, no sufficient removal by these methods was obtained. Instead of these methods, sulfuric and benzoic acids were separated by exclusion ion chromatography. Sulfuric acid was separated from benzoic acid by using ion exclusion column, and then the portion including sulfuric acid was reinjected to an ion chromatograph installed with the anion separator column for determination of sulfuric acid. The concentrations of sulfuric acid in the atmosphere at Hiyoshi, Yokohama from January to October, 1985 were 0.13~0.95 μg/m3. The detection limit of sulfuric acid by this method was 0.005 μg/m3 at sampling 4 m3 of air.
AB - A method for the determination of sulfuric acid in the atmosphere by ion chromatography was investigated. Sulfuric acid in aerosols collected on a Teflon filter was extracted with benzaldehyde as a selective solvent for sulfuric acid, and then sulfuric acid in benzaldehyde was counterextracted with distilled water for ion chromatography. In the counterextraction, a portion of benzaldehyde dissolved in distilled water, and was rapidly oxidized to benzoic acid. The benzoic acid produced by oxidation of benzaldehyde seriously interfered with the determination of sulfuric acid by ion chromatography due to the overlapping peaks. Various methods such as the reduction with zinc powder, the extraction with benzene, and the cooling were tested for removal of benzoic acid. However, no sufficient removal by these methods was obtained. Instead of these methods, sulfuric and benzoic acids were separated by exclusion ion chromatography. Sulfuric acid was separated from benzoic acid by using ion exclusion column, and then the portion including sulfuric acid was reinjected to an ion chromatograph installed with the anion separator column for determination of sulfuric acid. The concentrations of sulfuric acid in the atmosphere at Hiyoshi, Yokohama from January to October, 1985 were 0.13~0.95 μg/m3. The detection limit of sulfuric acid by this method was 0.005 μg/m3 at sampling 4 m3 of air.
KW - collection of sulfuric acid with ammonia removal tube
KW - determination of sulfuric acid in the atmosphere
KW - extraction with benzaldehyde
KW - reinjection ion chromatography
KW - separation between sulfuric acid and benzoic acid by exclusion ion chromatography
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U2 - 10.2116/bunsekikagaku.36.3_159
DO - 10.2116/bunsekikagaku.36.3_159
M3 - Article
AN - SCOPUS:84996000762
VL - 36
SP - 159
EP - 163
JO - Bunseki Kagaku
JF - Bunseki Kagaku
SN - 0525-1931
IS - 3
ER -