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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. 3.

Fig. 3.

Chromatograms of MDA derivatives found in 10 nM (A) and 5nM (B) matrix-free standards under single column separation.

Note: A= when a phenyl-hexyl column was used, B =when a C18 column was used.