Simultaneous quantification of aqueous peroxide, nitrate, and nitrite during the plasma-liquid interactions by derivative absorption spectrophotometry
Simultaneous quantification of aqueous peroxide, nitrate, and nitrite during the plasma-liquid interactions by derivative absorption spectrophotometry
复制标题
通过导数吸收分光光度法同时定量等离子体-液体相互作用过程中的过氧化氢、硝酸盐和亚硝酸盐
DOI：
10.1088/1361-6463/aa8819
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Qing Huo Liu
中科院分区：
文献类型：
--
作者：
Bangbang He.;Yupengxue Ma;Xinning Gong;Zhijun Long;Junshuai Li;Qing Xiong;Hai Liu;Qiang Chen;Xianhui Zhang;Size Yang;Qing Huo Liu
A derivative absorption spectroscopic method is used in situ to simultaneously trace and quantify the aqueous peroxide (H2O2), nitrate (NO− 3) and nitrite (NO− 2) generated during plasma–liquid interactions. The results indicate that the time evolutions of H2O2, NO− 3 and NO− 2 generated from the plasma–liquid interactions strongly depend on the solution’s pH value, which varies with the plasma treatment. The concentrations of aqueous H2O2, NO− 3 and NO− 2 increase independently from each other during the plasma treatment when the solution’s pH value is higher than 3.0. However, when the solution’s pH value is less than 3.0, most of the aqueous NO− 2 (~ 71.5%) will exist in the form of molecular nitrous acid since the pKa of nitrous acid is 3.4, the aqueous NO− 3 is mainly formed from the reaction between H2O2 and NO− 2 as well as the decomposition of molecular HNO2, which leads to a continuous increase of NO− 3 concentration and an appearance of the maximum concentrations of H2O2 and NO− 2 as the pH value of the solution reaches 3.0.
