气候变化领域集成服务门户(CCPortal): Re-evaluation of BioSampler and its improvement for on-line, time-resolved monitoring of environmental coarse aerosol

CCPortal

DOI	10.1016/j.atmosenv.2019.117249
	Re-evaluation of BioSampler and its improvement for on-line, time-resolved monitoring of environmental coarse aerosol
	Su Y.; Wang W.; Wang W.; Zhai L.; Shen X.; Xu J.; Li Z.
发表日期	2020
ISSN	13522310
英文摘要	BioSampler is now being widely used for bioaerosol sampling. However, the sampling efficiency in wide size range especially for nanoparticles as well as the size-dependent retention efficiency have not been well evaluated until now. Through literature review, theoretic analysis and experiments, this paper reviews the sampling process, collection mechanism and sampling performance of commercial BioSampler including pressure drop as a function of sampling flow rate, the mass loss rate and temperature of the collection fluid as a function of sampling time, the variation of retention efficiency with time, and the sampling efficiency in wide size range from nanometers to microns. The effects of low pressure and high relative humidity on determination of sampling efficiency in literature were carefully analyzed. To compensate the collection fluid loss and extract the insoluble/dissolved sample for further analysis, Continuous-Extraction BioSampler (CEBS) is proposed. The retention efficiency for particles of different sizes as well as the collection efficiency were determined and found to be identical with commercial BioSampler when no steam was introduced into CEBS. Finally, the combination uses of CEBS and Inductively-Coupled-Plasma Mass Spectrometer (ICP-MS) was developed. Exponentially Modified Gaussian (EMG) Model was derived and verified to describe the temporal concentration of the dissolved component originating from individual soluble droplet. Using internal standard calibration method and EMG fitting of signal curve, the target element amount in individual droplet could be determined accurately. For continuously-collected soluble droplet with duration of minutes, the observed signal curve can be described by EMG model and the fitted value of area varies linearly with the sample amount introduced. This paper not only provides comprehensive performance evaluation of commercial BioSampler, but also demonstrates that the proposed CEBS-ICPMS is capable of monitoring environmental coarse aerosol with time resolution of ~17 min. © 2019 Elsevier Ltd
英文关键词	BioSampler; Continuous-extraction BioSampler; Environmental coarse aerosol; Monitoring; Retention efficiency; Sampling efficiency
学科领域	Aerosols; Curve fitting; Drops; Efficiency; Function evaluation; Inductively coupled plasma; Inductively coupled plasma mass spectrometry; Mass spectrometers; Monitoring; Particle size analysis; Radioactive elements; BioSampler; Coarse aerosols; Continuous extraction; Retention efficiencies; Sampling efficiency; Extraction
语种	英语
scopus关键词	Aerosols; Curve fitting; Drops; Efficiency; Function evaluation; Inductively coupled plasma; Inductively coupled plasma mass spectrometry; Mass spectrometers; Monitoring; Particle size analysis; Radioactive elements; BioSampler; Coarse aerosols; Continuous extraction; Retention efficiencies; Sampling efficiency; Extraction
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120859
作者单位	Northwest Institute of Nuclear Technology, P.O. box 69-14, Xi'an, 710024, China
推荐引用方式 GB/T 7714	Su Y.,Wang W.,Wang W.,et al. Re-evaluation of BioSampler and its improvement for on-line, time-resolved monitoring of environmental coarse aerosol[J],2020.
APA	Su Y..,Wang W..,Wang W..,Zhai L..,Shen X..,...&Li Z..(2020).Re-evaluation of BioSampler and its improvement for on-line, time-resolved monitoring of environmental coarse aerosol.Atmospheric Environment.
MLA	Su Y.,et al."Re-evaluation of BioSampler and its improvement for on-line, time-resolved monitoring of environmental coarse aerosol".Atmospheric Environment (2020).