Relative Vapor-pressure Measurements Using A Frequency-modulated Tunable Diode-laser, A Tool For Water Activity Determination In Solutions
(1994) In Journal of Physical Chemistry 98(5). p.1411-1415- Abstract
- Two-tone frequency modulation spectroscopy (TTFMS) is applied to the determination of water activity using an 820-nm GaAlAs diode laser. By measuring the relative light absorption of water vapor over a solution and over a pure water reference, the water activity in the solution is determined. Fast, nonintrusive, and selective measurements are demonstrated. The detection limit for measuring a relative water vapor pressure change was 0.3%. The application of laser modulation spectroscopy to the determination Of water activity is discussed, and suggestions on increasing the sensitivity and accuracy are presented.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2258576
- author
- Kauranen, P ; Harwigsson, I and Jonsson, B
- publishing date
- 1994
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physical Chemistry
- volume
- 98
- issue
- 5
- pages
- 1411 - 1415
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:0346164874
- ISSN
- 0022-3654
- DOI
- 10.1021/j100056a007
- language
- English
- LU publication?
- no
- id
- 366cb002-cdc0-4914-9e7c-d66096f77220 (old id 2258576)
- date added to LUP
- 2016-04-04 09:27:25
- date last changed
- 2021-01-03 07:01:35
@article{366cb002-cdc0-4914-9e7c-d66096f77220, abstract = {{Two-tone frequency modulation spectroscopy (TTFMS) is applied to the determination of water activity using an 820-nm GaAlAs diode laser. By measuring the relative light absorption of water vapor over a solution and over a pure water reference, the water activity in the solution is determined. Fast, nonintrusive, and selective measurements are demonstrated. The detection limit for measuring a relative water vapor pressure change was 0.3%. The application of laser modulation spectroscopy to the determination Of water activity is discussed, and suggestions on increasing the sensitivity and accuracy are presented.}}, author = {{Kauranen, P and Harwigsson, I and Jonsson, B}}, issn = {{0022-3654}}, language = {{eng}}, number = {{5}}, pages = {{1411--1415}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Journal of Physical Chemistry}}, title = {{Relative Vapor-pressure Measurements Using A Frequency-modulated Tunable Diode-laser, A Tool For Water Activity Determination In Solutions}}, url = {{https://lup.lub.lu.se/search/files/5329469/2297342.pdf}}, doi = {{10.1021/j100056a007}}, volume = {{98}}, year = {{1994}}, }