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Interlaboratory Comparison of Ambient Air Samples

机译：环境空气样本的互制比较

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The California Air Resources Board (CARB) has developed a sampling system to collect ambient air samples that are used to evaluate the relative differences in non-methane hydrocarbon (NMHC) species among Photochemical Assessment Monitoring Station (PAMS) laboratories. The system is used to collect simultaneous ambient air samples from a site with historically high hydrocarbon concentrations. The sampling unit is capable of filling up to 10 canisters, with each canister sent to one of the designated PAMS laboratories for analysis. The responses are tabulated and made available to participating laboratories. The interlaboratory comparison check allows us to assess the variability of the measurement processes using real-world samples at ambient level concentrations. This system emulates a round-robin check using a single canister; however, unlike round-robin checks, it does not experience delays in routing a canister between laboratories, or gradual loss of canister pressure as the contents are analyzed. The system is used to complement the through-the-probe (TTP) and laboratory audits that use standards from the National Institute of Standards and Technology (NIST). The following paper presents the equipment, sampling methodology, and techniques used in the ambient air interlaboratory comparison check. The paper also presents recent data results and future Quality Assurance Section (QAS) applications of the interlaboratory comparison procedure.
机译：加州空气资源板（CARB）开发了一种采样系统，以收集用于评估光化学评估监测站（PAMS）实验室中非甲烷烃（NMHC）物种的相对差异的环境空气样本。该系统用于从具有历史上高碳氢化合物浓度的位点收集同时环境空气样本。采样装置能够填充最多10个罐，每个罐送到一个指定的PAM实验室一个用于分析。该响应列表并提供给参与实验室。 Interlaboratory的比较检查允许我们在环境级别浓度下使用现实样本来评估测量过程的可变性。该系统使用单个罐模拟循环检查;但是，与循环检查不同，它不会在实验室之间路由罐的延迟，或者分析内容时，罐压力逐渐损失。该系统用于补充使用国家标准和技术研究所（NIST）的标准的通知（TTP）和实验室审核。以下纸张介绍了环境空气交互式比较检查中使用的设备，采样方法和技术。本文还介绍了最近的数据结果和未来质量保证部分（QAS）应用程序的互联网比较程序。

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