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. 2020 Aug 7;8:639. doi: 10.3389/fchem.2020.00639

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Copyright © 2020 Wang, Wang, Huang, Chen and Wu.

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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Optimization of experimental conditions for nitrite analysis. (A) Volume of LaF₃:Ce NPs added into the CL system was optimized. (B) Concentration of H₂SO₄ used to acidify H₂O₂ was optimized. (C) Concentration of H₂O₂ was optimized. The standard error bars mean the variation of three individual experiments.