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. 2017 Dec 18;7:17728. doi: 10.1038/s41598-017-17579-5

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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HPLC chromatograms (monitored at 280 nm) showing the reduction of the quercetin and ascorbic acid standard and fragmented smaller molecular weight products for different plasma operation times. (A) The quercetin standard treated with clean dry air feed gas. Inset: The fragmented product obtained at retention time 7.4 to 7.9 min. (B) The quercetin standard treated with N₂ feed gas. Inset: Quercetin obtained at retention time approx. 45 min. (C) The ascorbic acid standard treated with clean dry air feed gas. Inset: ascorbic acid obtained at retention time approx. 3 min. (D) The ascorbic acid standard treated with N₂ feed gas. Inset: ascorbic acid obtained at retention approx. 3 min.