%0 Journal Article
%T Determination of hydroxyl radicals with salicylic acid in aqueous nitrate and nitrite solutions
%A YANG Xi
%A ZHAN Man-jun
%A KONG Ling-ren
%A WANG Lian-sheng
%A <br>YANG Xi
%A ZHAN Man-jun
%A KONG Ling-ren
%A WANG Lian-sheng
%J 环境科学学报(英文版)
%D 2004
%I 
%X The qualitative and quantitative analyses of reactive oxygen species are essential to determine their steady-state concentration and related reaction mechanisms in environmental aquatic systems. In this study, salicylic acid was employed as an innovative molecular probe of hydroxyl radical(OH) generated in aqueous nitrate and nitrite solutions through photochemical reactions. Kinetic studies showed that the steady-state concentrations of OH in aqueous NO- 3(10 mmol/L, pH=5) and NO- 2(10 mmol/L, pH=5) solutions under ultraviolet irradiation were at a same magnitude, 10 -15 mol/L. Apparent quantum yields of OH at 313 nm were measured as 0.011 and 0.07 for NO- 3 and NO- 2 respectively, all comparable to the results of previous studies.
%K photochemistry
%K hydroxyl radical
%K salicylic acid
%K nitrate
%K nitrite<br>水杨酸
%K 亚硝酸盐
%K ROS
%K 水环境
%K 环境分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=52D06718E9406B7BEA059EB5F141D5F3&yid=D0E58B75BFD8E51C&vid=7801E6FC5AE9020C&iid=E158A972A605785F&sid=F4C2D192FB73A21F&eid=128B7AEF80A42C95&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=1&reference_num=19