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Chromatographia

, Volume 37, Issue 3–4, pp 185–190 | Cite as

Quantification of 2,4-dinitrophenyl-hydrazones of low molecular mass aldehydes and ketones using HPLC

  • M. X. Coutrim
  • L. A. Nakamura
  • C. H. Collins
Late Papers of the Aix-en-Provence Symposium 1992

Summary

This study was undertaken to evaluate the HPLC separation and quantification of several low molecular mass aldehydes and ketones, which may be produced during combustion in alcohol-fueled automobiles, by means of their dinitrophenylhydrazone derivatives. Stationary phases (ODS), mobile phase components (acetonitrile or methanol with water) and detection sensitivity at 254 and 365 nm were evaluated. Separation of eight dinitrophenylhydrazones could be achieved in approximately 20 minutes using a Zorbax ODS or a Supelcosil LC-PAH column with a MeOH:H2O (75∶25 v/v) mobile phase. Complete separations were not obtained with either a Nova-Pack C-18 or an Ultrasphere ODS column. The use of acetonitrile-water mobile phases produces poorer resolution at all compositions tested. Quantification of the compounds by several methods was compared, with the lowest standard deviations being seen with the external than 1.5 pmol for each of the 2,4-dinitrophenylhydrazones in the test solution. The method is being applied to the analysis of aldehydes and ketones in the exhaust of automobile engines fueled by ethanolgasoline mixtures.

Key Words

Column liquid chromatography Aldehydes Ketones Dinitrophenylhydrazones 

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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1993

Authors and Affiliations

  • M. X. Coutrim
    • 1
  • L. A. Nakamura
    • 1
  • C. H. Collins
    • 1
  1. 1.Instituto de QuímicaUniversidade Estadual de CampinasCampinasBrazil

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