Characterization of an Aerodyne Aerosol Mass Spectrometer (AMS): Intercomparison with Other Aerosol Instruments
Characterization of an Aerodyne Aerosol Mass Spectrometer (AMS): Intercomparison with Other Aerosol Instruments
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DOI：
10.1080/02786820500243404
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发表时间：
2005-08
影响因子：
5.2
通讯作者：
N. Takegawa;Yuzo Miyazaki;Yutaka Kondo;Y. Komazaki;T. Miyakawa;J. L. Jimenez;J. Jayne;D. Worsnop;James Allan;Rodney J. Weber
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文献类型：
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作者：
N. Takegawa;Yuzo Miyazaki;Yutaka Kondo;Y. Komazaki;T. Miyakawa;J. L. Jimenez;J. Jayne;D. Worsnop;James Allan;Rodney J. Weber
Aerodyne 气溶胶质谱仪 (AMS) 提供非难熔（在真空下 600°C 蒸发）亚微米气溶胶的尺寸分辨化学成分，时间分辨率为分钟级。环境测量于 2003 年 2 月至 2004 年 2 月在东京进行。我们对 AMS 与颗粒液体进样器、离子色谱分析仪 (PILS-IC) 和 Sunset Laboratory 半连续热光碳分析仪进行了相互比较。 AMS 入口歧管的温度保持在环境露点以上 > 10 ˆ C，以干燥样本空气中的颗粒（入口中的相对湿度 (RH) < 53%）。假设 AMS 的颗粒收集效率为 0.5，则 AMS 测量的无机物质（硝酸盐、硫酸盐、氯化物和铵）的质量浓度与 PILS-IC 测量的一致，误差在 26% 以内。 AMS 测量的有机化合物的质量浓度与日落实验室碳分析仪测量的有机碳 (OC) 质量密切相关 (r 2 = 0.67–0.83)。假设 AMS 有机物的收集效率相同为 0.5，则线性回归斜率在夏季为 1.8，在秋季为 1.6。这些值与城市空气中有机物 (OM) 与 OC 的预期比率一致。
The Aerodyne Aerosol Mass Spectrometer (AMS) provides size-resolved chemical composition of non-refractory (vaporized at 600°C under vacuum) submicron aerosols with a time resolution of the order of minutes. Ambient measurements were performed in Tokyo between February 2003 and February 2004. We present intercomparisons of the AMS with a Particle-Into-Liquid Sampler combined with an Ion Chromatography analyzer (PILS-IC) and a Sunset Laboratory semi-continuous thermal-optical carbon analyzer. The temperature of the AMS inlet manifold was maintained at > 10 ˆ C above the ambient dew point to dry particles in the sample air (relative humidity (RH) in the inlet < 53%). Assuming a particle collection efficiency of 0.5 for the AMS, the mass concentrations of inorganic species (nitrate, sulfate, chloride, and ammonium) measured by the AMS agree with those measured by the PILS-IC to within 26%. The mass concentrations of organic compounds measured by the AMS correlate well with organic carbon (OC) mass measured by the Sunset Laboratory carbon analyzer (r 2 = 0.67–0.83). Assuming the same collection efficiency of 0.5 for the AMS organics, the linear regression slope is found to be 1.8 in summer and 1.6 in fall. These values are consistent with expected ratios of organic matter (OM) to OC in urban air.