Determination of Tropospheric Chlorine and Hypochlorous Acid Using Immobilized Sulfonamide Collectors

9505436强生将开发一种使用磺胺的对流层活性氯收集系统。对活性氯物种(主要是次氯酸和微粒状氯)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产生重大影响。与目前的方法相比，建议的收集技术的优点包括有可能提高灵敏度，可能存在活性氯化合物的形态，以及可能检测到活性溴。拟议的工作包括对磺胺结合介质的实验装置进行实验室测试，以评估：1)氯和次氯酸的收集效率，2)区分所收集的各种氯和溴物种的能力(包括可能的人工制品)，以及3)其他大气物种可能的干扰。拟议工作的最后阶段将是在加利福尼亚州一个偏远的海洋地点进行初步现场测量。

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.