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. Author manuscript; available in PMC: 2006 Apr 5.
Published in final edited form as: Eur Respir J. 2004 Dec;24(6):1011–1017. doi: 10.1183/09031936.04.00002404

Fig. 1.

Fig. 1

Chromatogram of the different classes of aldehydes measured in an induced sputum sample. Peak identification and analyte concentration: 1) malondialdehyde, 33.7 nM; 2) 4-hydroxyhexenal, 7.3 nM; 3) acrolein, 15.8 nM; 4) 4-hydroxynonenal, 7.9 nM; 5) n-hexanal, 14.9 nM; 6) n-heptanal, 15.6 nM; and 7) n-nonanal, 64.7 nM.