A review of experimental techniques for aerosol hygroscopicity studies

Mingjin Tang, Chak K. Chan, Yong Jie Li, Hang Su, Qingxin Ma, Zhijun Wu, Guohua Zhang, Zhe Wang, Maofa Ge, Min Hu, Hong He, Xinming Wang

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


Hygroscopicity is one of the most important physicochemical properties of aerosol particles and also plays indispensable roles in many other scientific and technical fields. A myriad of experimental techniques, which differ in principles, configurations and cost, are available for investigating aerosol hygroscopicity under subsaturated conditions (i.e., relative humidity below 100%). A comprehensive review of these techniques is provided in this paper, in which experimental techniques are broadly classified into four categories, according to the way samples under investigation are prepared. For each technique, we describe its operation principle and typical configuration, use representative examples reported in previous work to illustrate how this technique can help better understand aerosol hygroscopicity, and discuss its advantages and disadvantages. In addition, future directions are outlined and discussed for further technical improvement and instrumental development.
Original languageEnglish (US)
Pages (from-to)12631-12686
Number of pages56
JournalAtmospheric Chemistry and Physics
Issue number19
StatePublished - Oct 10 2019
Externally publishedYes

ASJC Scopus subject areas

  • Atmospheric Science


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