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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >MEASUREMENTS OF SULFUR DIOXIDE DURING GASIE WITH THE MIST CHAMBER TECHNIQUE
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MEASUREMENTS OF SULFUR DIOXIDE DURING GASIE WITH THE MIST CHAMBER TECHNIQUE

机译：雾室法测定气态二氧化硫

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摘要

This paper highlights the performance of the mist chamber/ion chromatography (MC/IC) technique for measuring atmospheric sulfur dioxide (SO2) during the Gas-Phase Sulfur Intercomparison Experiment (GASIE). The technique was found to be free of interference from CO, CO2, CH4, NOx, O-3, CH3SCH3, and H2O vapor. Repeated measurements at various mixing ratios of SO2 indicated that the coefficient of variation in the MC/IC measurement is 3-5% at 300-500 parts per trillion by volume (pptv), 4-7% at 150 pptv, 10% at 50 pptv, and as great as 20% near 20 pptv. In ambient air diluted five- to tenfold with zero air, the MC/IC technique tracked the other methods over the range of 30-3500 pptv. This agreement reinforced the conclusions obtained during the other test phases of GASIE. The MC/IC method has desirable features such as simplicity, small size, and weight of required equipment, sample integration times of 10 min or less, low pptv detection capabilities, and relatively modest implementation costs. In addition, a suite of important soluble gases can be measured simultaneously including nitric, formic, and acetic acids. [References: 26]
机译：本文着重介绍了气室硫离子比较实验（GASIE）中雾室/离子色谱（MC / IC）技术在测量大气中二氧化硫（SO2）方面的性能。发现该技术不受CO，CO2，CH4，NOx，O-3，CH3SCH3和H2O蒸气的干扰。在不同的SO2混合比下重复测量表明，MC / IC测量的变异系数在300-500 pptv（pptv）时为3-5％，在150 pptv时为4-7％，在50 pptv时为10％ pptv，在20 pptv附近高达20％。在用零空气稀释5到10倍的环境空气中，MC / IC技术在30-3500 pptv范围内跟踪了其他方法。该协议加强了在GASIE其他测试阶段获得的结论。 MC / IC方法具有所需的功能，例如简单性，所需设备的小尺寸和重量，10分钟或更短的样品积分时间，低pptv检测能力以及相对适中的实施成本。此外，可以同时测量一组重要的可溶性气体，包括硝酸，甲酸和乙酸。 [参考：26]

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