Supplementary material to "Single-particle investigation of summertime and wintertime Antarctic sea spray aerosols using low-Z particle EPMA, Raman microspectrometry, and ATR-FTIR imaging techniques"

Abstract. Two aerosol samples collected at King Sejong Korean scientific research station, Antarctica on Dec. 9, 2011 in the austral summer (sample S1) and July 23, 2012 in the austral winter (sample S2), when the oceanic chlorophyll-a levels were quite different, by ~19 times (2.46 vs. 0.13 μg/L, respectively), were investigated on a single particle basis using quantitative energy-dispersive electron probe X-ray microanalysis (ED-EPMA), called low-Z particle EPMA, Raman microspectrometry (RMS), and attenuated total reflectance Fourier transform infrared (ATR-FTIR) imaging techniques to obtain their characteristics based on the elemental chemical compositions, molecular species, and mixing state. X-ray analysis showed that the supermicron summertime and wintertime Antarctic aerosol samples have different elemental chemical compositions, even though all the individual particles analyzed were sea spray aerosols (SSAs); i.e., the contents of C, O, Ca, S, and Si were more elevated, whereas Cl was more depleted, for sample S1 having a much higher chlorophyll-a level than for sample S2. Based on qualitative analysis of the chemical species present in individual SSAs by the combined application of RMS and ATR-FTIR imaging, different organic species were encountered in samples S1 and S2; i.e., Mg hydrate salts of alanine were predominant in samples S1 and S2, whereas Mg salts of fatty acids internally mixed with Mg hydrate salts of alanine were significant in sample S2. Although CaSO4 was encountered significantly in both samples S1 and S2, other inorganic species, such as Na2SO4, NaNO3, Mg(NO3)2, SiO2, and CH3SO3Mg, were encountered more significantly in sample S1, suggesting that those compounds may be related to the higher phytoplankton activity in summer.

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Single-particle investigation of summertime and wintertime Antarctic sea spray aerosols using low-<i>Z</i> particle EPMA, Raman microspectrometry, and ATR-FTIR imaging techniques

Atmospheric Chemistry and Physics ◽

10.5194/acp-16-13823-2016 ◽

2016 ◽

Vol 16 (21) ◽

pp. 13823-13836 ◽

Cited By ~ 18

Author(s):

Hyo-Jin Eom ◽

Dhrubajyoti Gupta ◽

Hye-Rin Cho ◽

Hee Jin Hwang ◽

Soon Do Hur ◽

...

Keyword(s):

Single Particle ◽

Imaging Techniques ◽

Attenuated Total Reflection ◽

Sea Spray ◽

Chemical Compositions ◽

Research Station ◽

Ftir Imaging ◽

X Ray ◽

Inorganic Species ◽

Raman Microspectrometry

Abstract. Two aerosol samples collected at King Sejong Korean scientific research station, Antarctica, on 9 December 2011 in the austral summer (sample S1) and 23 July 2012 in the austral winter (sample S2), when the oceanic chlorophyll a levels on the collection days of the samples were quite different, by ∼  19 times (2.46 vs. 0.13 µg L−1, respectively), were investigated on a single-particle basis using quantitative energy-dispersive electron probe X-ray microanalysis (ED-EPMA), called low-Z particle EPMA, Raman microspectrometry (RMS), and attenuated total reflection Fourier transform infrared (ATR-FTIR) imaging techniques to obtain their characteristics based on the elemental chemical compositions, molecular species, and mixing state. X-ray analysis showed that the supermicron summertime and wintertime Antarctic aerosol samples have different elemental chemical compositions, even though all the individual particles analyzed were sea spray aerosols (SSAs); i.e., the contents of C, O, Ca, S, and Si were more elevated, whereas Cl was more depleted, for sample S1 than for sample S2. Based on qualitative analysis of the chemical species present in individual SSAs by the combined application of RMS and ATR-FTIR imaging, different organic species were observed in samples S1 and S2; i.e., Mg hydrate salts of alanine were predominant in samples S1 and S2, whereas Mg salts of fatty acids internally mixed with Mg hydrate salts of alanine were significant in sample S2. Although CaSO4 was observed significantly in both samples S1 and S2, other inorganic species, such as Na2SO4, NaNO3, Mg(NO3)2, SiO2, and CH3SO3Mg, were observed more significantly in sample S1, suggesting that those compounds may be related to the higher phytoplankton activity in summer.

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Multi-Modal Compositional Analysis of Layered Paint Chips of Automobiles by the Combined Application of ATR-FTIR Imaging, Raman Microspectrometry, and SEM/EDX

Molecules ◽

10.3390/molecules24071381 ◽

2019 ◽

Vol 24 (7) ◽

pp. 1381 ◽

Cited By ~ 5

Author(s):

Md Malek ◽

Takashi Nakazawa ◽

Hyun-Woo Kang ◽

Kouichi Tsuji ◽

Chul-Un Ro

Keyword(s):

Molecular Species ◽

Imaging Techniques ◽

Compositional Analysis ◽

Forensic Analysis ◽

Chemical Components ◽

Ftir Imaging ◽

Surface Protection ◽

Combined Application ◽

Number Of Layers ◽

Raman Microspectrometry

For the forensic analysis of multi-layered paint chips of hit-and-run cars, detailed compositional analysis, including minor/trace chemical components in the multi-layered paint chips, is crucial for the potential credentials of the run-away car as the number of layers, painting process, and used paints are quite specific to the types of cars, color of cars, and their surface protection depending on the car manufacturer and the year of manufacture, and yet overall characteristics of some paints used by car manufacturers might be quite similar. In the present study, attenuated total reflectance-Fourier transform infrared (ATR-FTIR) imaging, Raman microspectrometry (RMS), and scanning electron microscopy/energy-dispersive X-ray spectrometric (SEM/EDX) techniques were performed in combination for the detailed characterization of three car paint chip samples, which provided complementary and comprehensive information on the multi-layered paint chips. That is, optical microscopy, SEM, and ATR-FTIR imaging techniques provided information on the number of layers, physical heterogeneity of the layers, and layer thicknesses; EDX on the elemental chemical profiles and compositions; ATR-FTIR imaging on the molecular species of polymer resins, such as alkyd, alkyd-melamine, acrylic, epoxy, and butadiene resins, and some inorganics; and RMS on the molecular species of inorganic pigments (TiO2, ZnO, Fe3O4), mineral fillers (kaolinite, talc, pyrophyllite), and inorganic fillers (BaSO4, Al2(SO4)3, Zn3(PO4)2, CaCO3). This study demonstrates that the new multi-modal approach has powerful potential to elucidate chemical and physical characteristics of multi-layered car paint chips, which could be useful for determining the potential credentials of run-away cars.

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Single particle mineralogy of microparticles from Himalayan ice-cores using SEM/EDX and ATR-FTIR imaging techniques for identification of volcanic ash signatures

Chemical Geology ◽

10.1016/j.chemgeo.2018.11.010 ◽

2019 ◽

Vol 504 ◽

pp. 205-215 ◽

Cited By ~ 2

Author(s):

Md Abdul Malek ◽

Hyo-Jin Eom ◽

Heejin Hwang ◽

Soon Do Hur ◽

Sungmin Hong ◽

...

Keyword(s):

Single Particle ◽

Volcanic Ash ◽

Imaging Techniques ◽

Ice Cores ◽

Ftir Imaging

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Combined use of quantitative ED-EPMA, Raman microspectrometry, and ATR-FTIR imaging techniques for the analysis of individual particles

The Analyst ◽

10.1039/c4an00380b ◽

2014 ◽

Vol 139 (16) ◽

pp. 3949-3960 ◽

Cited By ~ 18

Author(s):

Hae-Jin Jung ◽

Hyo-Jin Eom ◽

Hyun-Woo Kang ◽

Myriam Moreau ◽

Sophie Sobanska ◽

...

Keyword(s):

Imaging Techniques ◽

Ftir Imaging ◽

Combined Use ◽

First Time ◽

Raman Microspectrometry ◽

Individual Particles

Quantitative ED-EPMA, RMS, and ATR-FTIR imaging techniques were used in combination for the analysis of the same individual particles for the first time.

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