The Aerosol Mobility Chromatograph: A New Detector for Sulfuric Acid Aerosols

LIU, B.Y.H.; Pui, David Y.H.; Whitby, K.T.; Kittelson, David B.; Kousaka, Yasuo; McKenzie, R. L.

doi:10.1016/b978-0-08-022932-4.50014-8

Cited by 142 publications

(109 citation statements)

References 12 publications

Supporting

Mentioning

108

Contrasting

Order By: Relevance

“…TDMA was first introduced by Liu et al (1978) as a technique to study the change in particle diameter as a response to changes in surrounding conditions (i.e., temperature or humidity). H-TDMA instruments have successfully been used in a multitude of studies to investigate particle size changes associated with changes in humidity (e.g., Sekigawa, 1983;McMurry and Stolzenburg, 1989;Swietlicki et al, 2008;Nilsson et al, 2009;Achtert et al, 2009).…”

Section: H-tdma Measurements Of Aerosol Particle Hygroscopic Growthmentioning

confidence: 99%

Seasonal variation of aerosol water uptake and its impact on the direct radiative effect at Ny-Ålesund, Svalbard

et al. 2014

View full text Add to dashboard Cite

Abstract. In this study we investigated the impact of water uptake by aerosol particles in ambient atmosphere on their optical properties and their direct radiative effect (ADRE, W m −2 ) in the Arctic at Ny-Ålesund, Svalbard, during 2008. To achieve this, we combined three models, a hygroscopic growth model, a Mie model and a radiative transfer model, with an extensive set of observational data. We found that the seasonal variation of dry aerosol scattering coefficients showed minimum values during the summer season and the beginning

show abstract

Section: H-tdma Measurements Of Aerosol Particle Hygroscopic Growthmentioning

confidence: 99%

Seasonal variation of aerosol water uptake and its impact on the direct radiative effect at Ny-Ålesund, Svalbard

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Efforts are currently undertaken to include the effects of hygroscopic growth of aerosol particles in global climate models (GCM) in order to better predict the scattering properties and size distribution of aerosols under varying humidity conditions (Randall et al, 2007). The two most widely used techniques enabling measurement of the change in the amount of water absorbed to an aerosols particle with varying RH are the single aerosol particle levitation technique using an electrodynamic balance (EDB; Tang and Munkelwitz, 1993) and the hygroscopicity tandem differential mobility analyser technique (HTDMA; Liu et al, 1978;Swietlicki et al, 2008). The EDB technique, which measures the properties of individual super-micrometer aerosol particles, is suitable for laboratory measurements.…”

Section: Introductionmentioning

confidence: 99%

Intercomparison study of six HTDMAs: results and recommendations

et al. 2009

View full text Add to dashboard Cite

Abstract.We report on an intercomparison of six different hygroscopicity tandem differential mobility analysers (HTDMAs). These HTDMAs are used worldwide in laboratory experiments and field campaigns to measure the water uptake of aerosol particles and have never been intercompared. After an investigation of the different design of the instruments with their advantages and inconveniencies, the methods for calibration, validation and data analysis are presented. Measurements of nebulised ammonium sulphate as well as of secondary organic aerosol generated from a smog chamber were performed. Agreement and discrepancies between the instruments and to the theory are discussed, and final recommendations for a standard instrument are given, as a benchmark for laboratory or field experiments to ensure a high quality of HTDMA data.

show abstract

“…Among all, the most frequently used is the hygroscopic tandem differential mobility analyzer (H-TDMA) (Liu et al, 1978;Rader and McMurry, 1986), which measures hygroscopic growth by size-selecting individual particles with a Differential Mobility Analyzer (DMA), exposing them to elevated or reduced RH and then measuring aerosol diameter change using a second DMA (Swietlicki et al, 2008;Kitamori et al, 2009;Ye et al, 2011;Wang et al, 2014). However, the HTDMA cannot easily measure liquid water content of atmospheric particles in their ambient state because particles are often dried prior to sampling, this fact cannot ensure that no other species but just water are removed (Gysel et al, 2006;Gysel et al, 2007;Swietlicki et al, 2008), or particles may effloresce or their morphology may change (Engelhart et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Continuous Measurement of Ambient Aerosol Liquid Water Content in Beijing

Fajardo

Jiang

Hao

2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

The amount of liquid water present on ambient aerosol particles influences its radiative properties, the partitioning of gas-phase organic and inorganic compounds to the condensed phase, and the assessment of particle health effects upon inhalation. An improved home-made Dry-Ambient Aerosol Size Spectrometer (DAASS) was implemented and deployed at a sampling site in Beijing to measure water content and volumetric growth factor of fine ambient aerosol during clean and polluted days. Aerosol chemical composition was characterized by an aerosol chemical speciation monitor (ACSM). Meteorological conditions were also assessed to trace origin of the air masses arriving at the site. A thermodynamic model, ISORROPIA II, was used to predict aerosol water content based on inorganic compositions measured by ACSM. It was then compared with the aerosol water content measured by DAASS. During the two-week sampling period, an aerosol efflorescence behavior was observed around 50% relative humidity (RH). Aerosol at the sample location was predominantly alkaline, with an average acidity ratio of 1.3 during the polluted days but very variable during the clean days. This fact coupled with generally low ambient RH resulted in low amounts of liquid water detected during the campaign. When RH reached its maximum of 87% and aerosol appeared to be more acidic, the maximum amount of aerosol water content measured was 1.3 µg m -3 (44.9% wt of DAASS measured ambient aerosol). Measured aerosol water content and model predictions seem to show a better agreement during the more polluted days, but during the clean days aerosol organic fraction appears to have an important contribution in the water content. We argue that the organicassociated water is comparable with that associated with inorganic compositions during the clean periods at low ambient RH conditions.

show abstract

The Aerosol Mobility Chromatograph: A New Detector for Sulfuric Acid Aerosols

Cited by 142 publications

References 12 publications

Seasonal variation of aerosol water uptake and its impact on the direct radiative effect at Ny-Ålesund, Svalbard

Seasonal variation of aerosol water uptake and its impact on the direct radiative effect at Ny-Ålesund, Svalbard

Intercomparison study of six HTDMAs: results and recommendations

Continuous Measurement of Ambient Aerosol Liquid Water Content in Beijing

Contact Info

Product

Resources

About