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. 2019 Apr 24;10:409. doi: 10.3389/fphar.2019.00409

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Copyright © 2019 Shi, Han, Yan, Qiao, He, Lian, Xia, Li, Zhang and Xu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Chromatograms of monoamine neurotransmitter with HPLC-ECD assay. NE (t_R = 2.7 min), DHBA (t_R = 4.3 min, internal standard), DOPAC (t_R = 5.1 min), DA (t_R = 6.4 min), 5-HIAA (t_R = 7.9 min), HVA (t_R = 13.5 min), 5-HT (t_R = 15.7 min). (A) Blank solution, (B) Solution of mixed standard substances, and (C) Sample solution of rat brain.