溶解有机碳
四甲基氢氧化铵
化学
氯
有机质
总有机碳
环境化学
反应性(心理学)
分析化学(期刊)
无机化学
吸光度
碳纤维
色谱法
有机化学
材料科学
医学
替代医学
病理
复合数
复合材料
作者
James L. Weishaar,George R. Aiken,Brian A. Bergamaschi,Miranda S. Fram,Roger Fujii,Kenneth Mopper
摘要
Specific UV absorbance (SUVA) is defined as the UV absorbance of a water sample at a given wavelength normalized for dissolved organic carbon (DOC) concentration. Our data indicate that SUVA, determined at 254 nm, is strongly correlated with percent aromaticity as determined by 13C NMR for 13 organic matter isolates obtained from a variety of aquatic environments. SUVA, therefore, is shown to be a useful parameter for estimating the dissolved aromatic carbon content in aquatic systems. Experiments involving the reactivity of DOC with chlorine and tetramethylammonium hydroxide (TMAH), however, show a wide range of reactivity for samples with similar SUVA values. These results indicate that, while SUVA measurements are good predictors of general chemical characteristics of DOC, they do not provide information about reactivity of DOC derived from different types of source materials. Sample pH, nitrate, and iron were found to influence SUVA measurements.
科研通智能强力驱动
Strongly Powered by AbleSci AI