In situ Quantification of Ammonium Sulfate in Single Aerosol Droplets by Means of Laser Trapping and Raman Spectroscopy
Analytical Sciences Volume 29 Issue 12
Page 1223-1226
published_at 2013-12
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| File | |
| Title ( eng ) |
In situ Quantification of Ammonium Sulfate in Single Aerosol Droplets by Means of Laser Trapping and Raman Spectroscopy
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| Creator |
Yamauchi Kunihiro
Kitamura Noboru
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| Source Title |
Analytical Sciences
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| Volume | 29 |
| Issue | 12 |
| Start Page | 1223 |
| End Page | 1226 |
| Abstract |
Noncontact levitation in air of single micrometer-sized water droplets containing ammonium sulfate was successful by a laser trapping technique. The trapping laser beam was also used simultaneously as an excitation light source for the Raman spectroscopy of trapped droplets. Raman scattering of the symmetric stretching vibration of the SO42− anion and the OH stretching vibrations of H2O were observed at 980 and 3420 cm−1, respectively. The intensity ratio of these two Raman peaks was linearly proportional to the ammonium sulfate concentration in water. Therefore, the in situ quantification of ammonium sulfate in single aerosol droplets was achieved by means of laser trapping and Raman spectroscopy. To the best of our knowledge, this study is the first experimental observation of the independence of ammonium sulfate concentrations of aerosol water droplets to those of the mother solutions under constant relative humidity conditions.
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| Keywords |
Laser trapping
Raman spectroscopy
aerosol
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| Descriptions |
This research was supported by JST, PRESTO and Grand-in-Aid for Scientific Research (A) (No. 23245015) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.
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| NDC |
Chemistry [ 430 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
The Japan Society for Analytical Chemistry
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| Date of Issued | 2013-12 |
| Rights |
2013 © The Japan Society for Analytical Chemistry
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0910-6340
[ISSN] 1348-2246
[NCID] AA10500785
[DOI] 10.2116/analsci.29.1223
[DOI] https://doi.org/10.2116/analsci.29.1223
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