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Article: Determination of aldehydes and ketones in ambient air by micellar electrokinetic capillary chromatography

TitleDetermination of aldehydes and ketones in ambient air by micellar electrokinetic capillary chromatography
Authors
Issue Date1999
Citation
Journal Of Aoac International, 1999, v. 82 n. 6, p. 1571-1576 How to Cite?
AbstractA new analytical method was developed for determining 14 aldehydes and ketones of environmental interest in ambient air. The method uses 2,4-dinitrophenylhydrazine (DNPH)-coated silica cartridges for sampling, acetonitrile for preconcentration, and micellar electrokinetic capillary chromatography for separation and quantitation. With hydrodynamic sampling of 8.5 cm cartridge for 30 s, applied voltage of 25 kV, detection at 360 nm, and separation in a 60 cm long, 50 μm id fused silica column at ambient temperature (25° ± 1 °C) within an electrophoretic buffer (20 mM borate/50 mM sodium dodecyl sulfate at pH 9.2 in 20% [v/v] methanol), baseline separation was obtained for DNPH derivatives of formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde, butanone, crotonaldehyde, isobutyraldehyde/butyraldehyde, 2-pentenaldehyde, isovaleraldehyde, valeraldehyde, benzaldehyde, and hexaldehyde. Detection limits [signal-to-noise (S/N) ratio = 2] ranged from 0.10 to 0.77 mg/L, the working range was 0.3-86 mg/L, and the precision as indicated by the relative standard deviation ranged from 2.3 to 6.6% (n = 3). With 1 h sampling at 0.25 L/min and a 1000-fold enrichment, most carbonyl compounds in ambient air can be determined with detection limits ranging from 0.008 to 0.1 mg/m3 and a working range of 0.04-11 μg/m3. The developed method was successfully applied to the determination of carbonyl compounds in a chemical laboratory and at street level.
Persistent Identifierhttp://hdl.handle.net/10722/167270
ISSN
2015 Impact Factor: 0.918
2015 SCImago Journal Rankings: 0.458
References

 

DC FieldValueLanguage
dc.contributor.authorFung, YSen_US
dc.contributor.authorLong, YHen_US
dc.date.accessioned2012-10-08T03:05:05Z-
dc.date.available2012-10-08T03:05:05Z-
dc.date.issued1999en_US
dc.identifier.citationJournal Of Aoac International, 1999, v. 82 n. 6, p. 1571-1576en_US
dc.identifier.issn1060-3271en_US
dc.identifier.urihttp://hdl.handle.net/10722/167270-
dc.description.abstractA new analytical method was developed for determining 14 aldehydes and ketones of environmental interest in ambient air. The method uses 2,4-dinitrophenylhydrazine (DNPH)-coated silica cartridges for sampling, acetonitrile for preconcentration, and micellar electrokinetic capillary chromatography for separation and quantitation. With hydrodynamic sampling of 8.5 cm cartridge for 30 s, applied voltage of 25 kV, detection at 360 nm, and separation in a 60 cm long, 50 μm id fused silica column at ambient temperature (25° ± 1 °C) within an electrophoretic buffer (20 mM borate/50 mM sodium dodecyl sulfate at pH 9.2 in 20% [v/v] methanol), baseline separation was obtained for DNPH derivatives of formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde, butanone, crotonaldehyde, isobutyraldehyde/butyraldehyde, 2-pentenaldehyde, isovaleraldehyde, valeraldehyde, benzaldehyde, and hexaldehyde. Detection limits [signal-to-noise (S/N) ratio = 2] ranged from 0.10 to 0.77 mg/L, the working range was 0.3-86 mg/L, and the precision as indicated by the relative standard deviation ranged from 2.3 to 6.6% (n = 3). With 1 h sampling at 0.25 L/min and a 1000-fold enrichment, most carbonyl compounds in ambient air can be determined with detection limits ranging from 0.008 to 0.1 mg/m3 and a working range of 0.04-11 μg/m3. The developed method was successfully applied to the determination of carbonyl compounds in a chemical laboratory and at street level.en_US
dc.languageengen_US
dc.relation.ispartofJournal of AOAC Internationalen_US
dc.titleDetermination of aldehydes and ketones in ambient air by micellar electrokinetic capillary chromatographyen_US
dc.typeArticleen_US
dc.identifier.emailFung, YS:ysfung@hku.hken_US
dc.identifier.authorityFung, YS=rp00697en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0000402094en_US
dc.identifier.hkuros54362-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000402094&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume82en_US
dc.identifier.issue6en_US
dc.identifier.spage1571en_US
dc.identifier.epage1576en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridFung, YS=13309754700en_US
dc.identifier.scopusauthoridLong, YH=7203043014en_US

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