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. 2019 Oct 22;10:1252. doi: 10.3389/fphar.2019.01252

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Copyright © 2019 Zou, Ge, Chen, Li, Yang, Wang, Gao and Chang

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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Effects of parameters on recovery and matrix effects of five alkaloids: (A, B) Type of the sorbent. (C, D) Amount of the sorbent. (E, F) Concentration of methanol taken as washing solution. (G, H) Type and volume of eluent.