Trace determination of carbonyl compounds in air by gas chromatography of their 2,4-dinitrophenylhydrazones

Smith, Ray; Drummond, I.

doi:10.1039/an9790400875

Cited by 21 publications

(9 citation statements)

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“…The peak at 1l::4 min appears to be a DNPH decomposition product. As has been reponed by others, double peaks were observed for acetaldehyde and propionaldehyde, presumably due to the syn and anti forms of the hydrazones (Smith and Drummond, 1979). The detector output was sent to an HP3393 integrator equipped with an HP9114B disk drive to enable re-analysis of chromatograms.…”

Section: Methodsmentioning

confidence: 99%

Atmospheric concentrations and temporal variations of C1C3 carbonyl compounds at two rural sites in central Ontario

Shepson

Hastie

Schiff

et al. 1991

Atmospheric Environment. Part A. General Topics

143

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Section: Methodsmentioning

confidence: 99%

Atmospheric concentrations and temporal variations of C1C3 carbonyl compounds at two rural sites in central Ontario

Shepson

Hastie

Schiff

et al. 1991

Atmospheric Environment. Part A. General Topics

143

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“…The isomerization of 2,4-dinitrophenylhydrazones has already received attention [31][32][33]: isomerization is enhanced under acidic conditions, e.g., by the use of solvents containing traces of acids. Formaldehyde, symmetrical ketones, unsaturated and aromatic aldehydes and ketones, and compounds with bulky groups, form only one derivative.…”

Section: Methodsmentioning

confidence: 99%

“…The hydrazones were recrystallized twice from carbonyl-free ethanol or ehtanol/water, and kept over concentrated sulphuric acid. Standard solutions were prepared in cyclohexane/toluene 5 : 1 v/v and a crystal of DNPH was added to each flask [33].…”

Section: Reagentsmentioning

confidence: 99%

The determination of aldehydes in the exhaust gases of LPG fuelled engines

et al. 1988

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SummaryThe exhaust gas of a LPG fuelled engine is drawn through two bubblers in series in an ice bath, and filled with saturated 2,4-dinitrophenylhydrazine in 2M HCI. After heating the derivatives are extracted with toluene-cyclohexane and l gl samples injected "on-column" on a OVl capillary Column. Using an FID the lower limit of detection is 15-18pg for formaldehyde (about 8--10 ppbv for a 161 exhaust sample). Taking the blank into account, the limit is about 40ppbv.The exhaust gases of a LPG-fuelled engine contain formaldehyde, acetaldehyde, propionaldehyde, acrolein and acetone. Carbonyl compounds of more than 3 C-atoms were not found in detectable amounts. The engine was fund under stoichiometric, lean and rich air/fuel conditions. Under rich conditions the concentrations of the aldehydes were: formaldehyde 2.8ppm, acetaldehyde 1.3 ppm, propionaldehyde 0.06 ppm, acrolein 0.03 ppm, acetone 0.17ppm; under stoichiometric conditions: 4.5, 1.6, 0.10, 0.03 and 0.18ppm respectively; under lean conditions 17.0, 2.9, 0.13, 0.07 and O.27ppm respectively. These figures demonstrate the necessity of measuring aldehydes in exhaust gases of LPG-fuelled engines.lean misfire limit of an LPG-fuelled engine extends well beyond the limit with gasoline and can be used to achieve low emission levels of regulated pollutants (hydrocarbons, oxides of nitrogen, carbon monoxide). However, the problem of obtaining a suitable LPG engine with proper carburation and ignition design, hinders full utilization of LPG as a "clean" motor fuel. Moreover, the use of LPG as a motor fuel depends largely on the fuel tax policy of the various countries.

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“…In order to obtain higher sensitivity, the formation of hydrazones, which can be used both for GC and HPLC analysis, has been utilized. The most frequently used are the 2,4-dinitrophenylhydrazones (1,4,5,7,9,12,13,16,19,20,23,24,26,28,29,30), but pentafluorophenylhydrazones (8,15) and, for HPLC, the dansylhydrazones (6,12) have also been demonstrated to be useful.…”

mentioning

confidence: 99%

“…To date, the method most frequently used for the sampling of volatile aldehydes involves the use of liquid absorbing solutions with bisulfite or 2,4-dinitrophenylhydrazine (DNPH) in impinger flasks (5,7,12,17,20,22,28). …”

mentioning

confidence: 99%

Chemosorption sampling and analysis of formaldehyde in air. Influence on recovery during the simultaneous sampling of formaldehyde, phenol, furfural and furfuryl alcohol.

Andersson¹,

Hallgren²,

Levin³

et al. 1981

Scand J Work Environ Health

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Trace determination of carbonyl compounds in air by gas chromatography of their 2,4-dinitrophenylhydrazones

Cited by 21 publications

References 0 publications

Atmospheric concentrations and temporal variations of C1C3 carbonyl compounds at two rural sites in central Ontario

Atmospheric concentrations and temporal variations of C1C3 carbonyl compounds at two rural sites in central Ontario

The determination of aldehydes in the exhaust gases of LPG fuelled engines

Chemosorption sampling and analysis of formaldehyde in air. Influence on recovery during the simultaneous sampling of formaldehyde, phenol, furfural and furfuryl alcohol.

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