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Design and Laboratory Evaluation of a Sequential Spot Sampler for Time-Resolved Measurement of Airborne Particle Composition
Aerosol Science and Technology ( IF 5.2 ) Pub Date : 2014-04-25 , DOI: 10.1080/02786826.2014.911409
Arantzazu Eiguren Fernandez 1 , Gregory S Lewis 1 , Susanne V Hering 1
Affiliation  

A new sampling approach has been developed to enable affordable, time-resolved monitoring of particulate chemical composition, and more generally to provide concentrated samples of airborne particles. Using a newly developed, moderated water-based condensational growth technology, individual particle samples are deposited in a 1-mm diameter dry “spot.” The moderated condensation technology enables this collection with minimal temperature rise, providing robust collection for volatile constituents. Measured collection efficiencies are above 95% for particles in the size range from 0.010 μm to 2.5 μm. A set of 20 or more time-resolved samples, plus blanks, may be collected onto a multiwell collection plate. For chemical analysis the plate is returned to the laboratory, and placed directly into a modified autosampler, without extraction or preparation. The autosampler handles the addition of eluent, extraction, and sample injection without user manipulation. This article presents the design and laboratory evaluation of a 1.5 L/min sampling rate version of this system. Copyright 2014 American Association for Aerosol Research

中文翻译:

用于空气颗粒成分时间分辨测量的连续点采样器的设计和实验室评估

已经开发出一种新的采样方法,以实现对颗粒化学成分的经济、时间分辨的监测,并且更普遍地提供空气中颗粒的浓缩样本。使用新开发的缓和水基冷凝生长技术,单个颗粒样品沉积在直径为 1 毫米的干燥“点”中。缓和冷凝技术使该收集能够以最小的温升进行,从而为挥发性成分提供可靠的收集。对于尺寸范围为 0.010 μm 至 2.5 μm 的颗粒,测得的收集效率高于 95%。可以将一组 20 个或更多时间分辨样品以及空白收集到多孔收集板上。对于化学分析,将板返回实验室,并直接放入改进的自动进样器中,无需提取或制备。自动进样器无需用户操作即可处理淋洗液的添加、萃取和进样。本文介绍了该系统 1.5 L/min 采样率版本的设计和实验室评估。版权所有 2014 美国气溶胶研究协会
更新日期:2014-04-25
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