Abstract A particle-into-liquid sampler (PILS) was coupled to a flow-through conductivity cell to provide a continuous, nondestructive, online measurement in support of offline ion chromatography analysis. The conductivity measurement provides a rapid assessment of the total ion concentration augmenting slower batch-sample data from offline analysis and is developed primarily to assist airborne measurements, where fast time-response is essential. A conductivity model was developed for measured ions and excellent closure was derived for laboratory-generated aerosols (97% conductivity explained, R2 > 0.99). The PILS-conductivity measurement was extensively tested throughout the NASA Cloud, Aerosol and Monsoon Processes: Philippines Experiment (CAMP2Ex) during nineteen research flights. A diverse range of ambient aerosol was sampled from biomass burning, fresh and aged urban pollution, and marine sources. Ambient aerosol did not exhibit the same degree of closure as the laboratory aerosol, with measured ions only accountable for 43% of the conductivity. The remaining fraction of the conductivity was examined in combination with ion charge balance and found to provide additional supporting information for diagnosing and modeling particle acidity. An urban plume case study was used to demonstrate the utility of the measurement for supplementing compositional data and augmenting the temporal capability of the PILS.

中文翻译：

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将在线离子电导率测量与颗粒到液体采样器相结合：使用实验室和现场气溶胶数据进行评估和建模

摘要 颗粒液体进样器 (PILS) 与流通式电导池耦合，以提供连续、无损、在线测量，支持离线离子色谱分析。电导率测量提供了总离子浓度的快速评估，增加了来自离线分析的较慢批次样品数据，主要用于辅助机载测量，其中快速时间响应是必不可少的。为测量的离子开发了电导率模型，并为实验室产生的气溶胶导出了极好的封闭性（解释了 97% 的电导率，R2 > 0.99）。在 19 次研究飞行期间，PILS 电导率测量在整个 NASA 云、气溶胶和季风过程：菲律宾实验 (CAMP2Ex) 中进行了广泛测试。从生物质燃烧、新鲜和老化的城市污染以及海洋来源中采样了各种环境气溶胶。环境气溶胶没有表现出与实验室气溶胶相同的封闭程度，测量的离子仅占电导率的 43%。电导率的剩余部分结合离子电荷平衡进行了检查，发现为诊断和模拟颗粒酸度提供了额外的支持信息。城市羽流案例研究用于证明测量在补充成分数据和增强 PILS 的时间能力方面的效用。电导率的剩余部分结合离子电荷平衡进行了检查，发现为诊断和模拟颗粒酸度提供了额外的支持信息。城市羽流案例研究用于证明测量在补充成分数据和增强 PILS 的时间能力方面的效用。电导率的剩余部分结合离子电荷平衡进行了检查，发现为诊断和模拟颗粒酸度提供了额外的支持信息。城市羽流案例研究用于证明测量在补充成分数据和增强 PILS 的时间能力方面的效用。