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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >INTERCOMPARISON OF MEASUREMENTS OF SULFUR DIOXIDE IN AMBIENT AIR BY CARBONATE-IMPREGNATED FILTERS AND TECO PULSED-FLUORESCENCE ANALYZERS
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INTERCOMPARISON OF MEASUREMENTS OF SULFUR DIOXIDE IN AMBIENT AIR BY CARBONATE-IMPREGNATED FILTERS AND TECO PULSED-FLUORESCENCE ANALYZERS

机译：碳酸盐浸渍过滤器和TECO脉冲荧光分析仪测量环境空气中二氧化硫的比较

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摘要

In two previous University of Washington field programs, airborne measurements of SO2 using carbonate-impregnated filters and a Teco pulsed-fluorescence analyzer showed excellent agreement over a range of ambient concentrations from 2 to 127 ppbv. As part of the Gas-Phase Sulfur Intercomparison Experiment (GASIE), ambient air, diluted fivefold to tenfold with zero air, was sampled in the concentration range of 0.02 to 4 ppbv. With the bulk of the measurements in the range of 40 to 230 parts per trillion by volume (pptv), agreement between the two techniques was again very good (regression equation: Teco = 1.07(filter)+ 4.5 pptv, r = 0.93). Using careful precleaning, impregnation, storage, and handling techniques for the filter substrates, at sub-100 pptv concentrations, the filter method is capable of an accuracy of better than +/-10% with a +/-7 pptv uncertainty (due to blank variability) for 6 m(3) samples. In addition, the Teco model 43 S is capable of rather precise measurements of sub-100 pptv concentrations (approximately +/-16 pptv) provided a suitable averaging time is employed (at least 10 min). [References: 11]
机译：在之前的两个华盛顿大学实地计划中，使用碳酸盐浸渍的过滤器和Teco脉冲荧光分析仪对二氧化硫进行空气传播测量，在2到127 ppbv的环境浓度范围内显示出极好的一致性。作为气相硫比较实验（GASIE）的一部分，以0.02至4 ppbv的浓度范围对用零空气稀释5倍至10倍的环境空气进行了采样。由于测量的大部分范围在每兆体积40（pptv）至230万亿分之（pptv）之间，两种技术之间的一致性再次非常好（回归方程：Teco = 1.07（filter）+ 4.5 pptv，r = 0.93）。在浓度低于100 pptv的条件下，通过对过滤器基板使用仔细的预清洗，浸渍，存储和处理技术，该过滤方法的准确度优于+/- 10％，不确定性为+/- 7 pptv（由于空白变异性）用于6 m（3）个样本。此外，如果采用合适的平均时间（至少10分钟），Teco 43 S型能够相当精确地测量100 pptv以下的浓度（约+/- 16 pptv）。 [参考：11]

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