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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2018 Dec 13;1105:210–216. doi: 10.1016/j.jchromb.2018.12.009

Fig. 2.

Fig. 2.

Chromatograms of malondialdehyde-2,4-dinitrophenylhydrazine [MDA-DNPH (m/z = 235)] and deuterated internal standard D2-MDA-DNPH (m/z =237) derivatives

Note: A= blank, B= EBC sample (final concentration =1.63 nM), C= lowest calibration level (prepared from the 1.0 nM standard solution), D = low-level quality control (prepared from the 5nM standard solution).