Open AccessEstimation of Hydroxyl Free Radicals Produced by Atmospheric Air Cold Plasma with Salicylic Acid Trapping
Author(s) -
Nguyen Van Hoang,
Nguyen Cao Tuan
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22795
Subject(s) - chemistry , salicylic acid , radical , hydroxyl radical , scavenger , plasma , chromatography , organic chemistry , biochemistry , physics , quantum mechanics
Salicylic acid is used as a scavenger to quantify free hydroxyl radicals (•OH) produced from a coldplasma process. High-performance liquid chromatography revealed that salicylic acid was decomposedto 2,3-dihydroxybenzoic acid (2,3-DHB) and 2,5-dihydroxybenzoic acid (2,5-DHB). The concentrationsof 2,3-DHB and 2,5-DHB were the highest when the concentration of salicylic acid was > 8,000 mg/L.Quantifying 2,3-DHB and 2,5-DHB concentrations revealed the association between the •OHconcentration and the reaction time by using the following first-order equation: [•OH] = 0.01713t +0.0311. Additionally, the rate of •OH formation in relation to different cold plasma conditions wasalso determined.