Determination of Tropospheric Chlorine and Hypochlorous Acid Using Immobilized Sulfonamide Collectors

9505436 Johnson将开发一种基于磺胺的对流层活性氯收集系统。活性氯物种（主要是次氯酸和分子氯）的测量是最近关注的问题，因为这些物种可能对海洋边界层化学有重大影响。与现有方法相比，所提出的收集技术的优点包括提高灵敏度的潜力，活性氯化合物形成的可能性，以及检测活性溴的可能性。拟议的工作包括对磺胺结合介质的实验实施进行实验室测试，以评估：1)氯和次氯酸的收集效率，2)区分收集到的各种氯和溴的能力（包括可能的人工产物），以及3)来自其他大气物种的可能干扰。拟议工作的最后阶段将是在加州一个偏远的海洋地点进行初步的实地测量。

9505436 Johnson A sulfonamide-based collection system for tropospheric active chlorine will be developed. Measurements of active chlorine species (predominantly hypochlorous acid and mmlecular chlorine) is a recent concern, as these species may have a significant impact on marine boundary layer chemistry. Advantages of the proposed collection technique over current methods include the potential for enhanced sensitivity, the possibility of speciation of active chlorine compounds, and the possibility of detecting active bromine. The proposed work includes laboratory testing of experimental implementations of sulfonamide-bonded media to evaluate: 1) collection efficiency for chlorine and hypochlorous acid, 2) ability to discriminate between the various chlorine and bromine species collected (including possible artifacts), and 3) possible interferences from other atmospheric species. The final stage of the proposed work will be preliminary field measurements at a remote marine site in California.