The Hydropathy Scale as a Gauge of Hygroscopicity in Sub-Micron Sodium Chloride-Amino Acid Aerosols

Joshua P. Darr, Salvatore Gottuso, Mohammed Alfarra, David Birge, Kimberly Ferris, Dillon Woods, Paul Morales, Megan Grove, William K. Mitts, Eduardo Mendoza-Lopez, Amissabah Johnson

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Sodium chloride, NaCl, is commonly used as a proxy for sea spray aerosols. However, field work has demonstrated that sea spray aerosols also often contain a significant organic component. In this work, we examine the effect of amino acids on the hygroscopic properties of NaCl aerosols using a Fourier transform infrared spectrometer coupled to a flow-cell apparatus. It is found that the effect can be drastically different depending on the nature of the amino acid. More hydrophilic amino acids such as glycine lead to continuous hygroscopic growth of internally mixed NaCl-amino acid aerosols generated from an equimolar precursor solution. However, more hydrophobic amino acids such as alanine do not significantly alter the hygroscopicity of NaCl aerosols. The hydropathy scale is found to be a good qualitative diagnostic for the effect that an amino acid will have on the hygroscopicity of NaCl.

Original languageEnglish (US)
Pages (from-to)8062-8070
Number of pages9
JournalJournal of Physical Chemistry A
Volume122
Issue number40
DOIs
StatePublished - Oct 11 2018

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hygroscopicity
sodium chlorides
Aerosols
Sodium Chloride
Gages
amino acids
aerosols
Amino Acids
sprayers
Infrared spectrometers
infrared spectrometers
alanine
glycine
Alanine
Glycine
Fourier transforms
cells

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

The Hydropathy Scale as a Gauge of Hygroscopicity in Sub-Micron Sodium Chloride-Amino Acid Aerosols. / Darr, Joshua P.; Gottuso, Salvatore; Alfarra, Mohammed; Birge, David; Ferris, Kimberly; Woods, Dillon; Morales, Paul; Grove, Megan; Mitts, William K.; Mendoza-Lopez, Eduardo; Johnson, Amissabah.

In: Journal of Physical Chemistry A, Vol. 122, No. 40, 11.10.2018, p. 8062-8070.

Research output: Contribution to journalArticle

Darr, JP, Gottuso, S, Alfarra, M, Birge, D, Ferris, K, Woods, D, Morales, P, Grove, M, Mitts, WK, Mendoza-Lopez, E & Johnson, A 2018, 'The Hydropathy Scale as a Gauge of Hygroscopicity in Sub-Micron Sodium Chloride-Amino Acid Aerosols', Journal of Physical Chemistry A, vol. 122, no. 40, pp. 8062-8070. https://doi.org/10.1021/acs.jpca.8b07119
Darr, Joshua P. ; Gottuso, Salvatore ; Alfarra, Mohammed ; Birge, David ; Ferris, Kimberly ; Woods, Dillon ; Morales, Paul ; Grove, Megan ; Mitts, William K. ; Mendoza-Lopez, Eduardo ; Johnson, Amissabah. / The Hydropathy Scale as a Gauge of Hygroscopicity in Sub-Micron Sodium Chloride-Amino Acid Aerosols. In: Journal of Physical Chemistry A. 2018 ; Vol. 122, No. 40. pp. 8062-8070.
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