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. Author manuscript; available in PMC: 2018 Jun 21.
Published in final edited form as: J Chromatogr A. 2014 Apr 28;1347:104–110. doi: 10.1016/j.chroma.2014.04.070

Fig. 3.

Fig. 3

Unknown compound separated from PA 37:4 (internal standard) only at high mass resolution. Mass resolution was calculated according to IUPAC definition (10 % peak valley).