Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring
Diffuse reflectance measurements and photon migration studies with near infrared (NIR) diode lasers were employed to elucidate experimental methods for determining absorption and scattering coefficients and species concentrations in heterogenous media. Measurements were performed at a number of wave...
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| Format: | Article |
| Language: | English |
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Wiley
2002-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X02000041 |
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| _version_ | 1832552117275983872 |
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| author | Frank Schael Oliver Reich Sonja Engelhard |
| author_facet | Frank Schael Oliver Reich Sonja Engelhard |
| author_sort | Frank Schael |
| collection | DOAJ |
| description | Diffuse reflectance measurements and photon migration studies with near infrared (NIR) diode
lasers were employed to elucidate experimental methods for determining absorption and scattering coefficients
and species concentrations in heterogenous media. Measurements were performed at a number of
wavelengths utilizing several laser sources some of which were widely tunable. In order to establish the
applicability of simple photon migration models derived from radiation transport theory and to check the
experimental boundary conditions of our measurements, simple light scattering solutions (such as suspensions
of titanium dioxide, latex particles, and solutions of milk powder) containing dyes (such as nile blue,
isosulfan blue) were investigated. The results obtained from diffuse-reflectance studies at different sourcedetector
distances were in accordance with predictions from simple photon diffusion theory. Applications
of reflectance measurements for monitoring of cell growth during fermentation processes and for in-situ
investigations of soils are presented. |
| format | Article |
| id | doaj-art-62f88523794b416594c3bb3b7ed129b2 |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2002-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-62f88523794b416594c3bb3b7ed129b22025-02-03T05:59:30ZengWileyInternational Journal of Photoenergy1110-662X2002-01-0141212610.1155/S1110662X02000041Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoringFrank Schael0Oliver Reich1Sonja Engelhard2Institut für Physikalische Chemie und Theoretische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, Golm D-14476, GermanyInstitut für Physikalische Chemie und Theoretische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, Golm D-14476, GermanyInstitut für Physikalische Chemie und Theoretische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, Golm D-14476, GermanyDiffuse reflectance measurements and photon migration studies with near infrared (NIR) diode lasers were employed to elucidate experimental methods for determining absorption and scattering coefficients and species concentrations in heterogenous media. Measurements were performed at a number of wavelengths utilizing several laser sources some of which were widely tunable. In order to establish the applicability of simple photon migration models derived from radiation transport theory and to check the experimental boundary conditions of our measurements, simple light scattering solutions (such as suspensions of titanium dioxide, latex particles, and solutions of milk powder) containing dyes (such as nile blue, isosulfan blue) were investigated. The results obtained from diffuse-reflectance studies at different sourcedetector distances were in accordance with predictions from simple photon diffusion theory. Applications of reflectance measurements for monitoring of cell growth during fermentation processes and for in-situ investigations of soils are presented.http://dx.doi.org/10.1155/S1110662X02000041 |
| spellingShingle | Frank Schael Oliver Reich Sonja Engelhard Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring International Journal of Photoenergy |
| title | Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring |
| title_full | Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring |
| title_fullStr | Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring |
| title_full_unstemmed | Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring |
| title_short | Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring |
| title_sort | spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring |
| url | http://dx.doi.org/10.1155/S1110662X02000041 |
| work_keys_str_mv | AT frankschael spectroscopyinheterogenousmediaandapplicationsforbioprocessandenvironmentalmonitoring AT oliverreich spectroscopyinheterogenousmediaandapplicationsforbioprocessandenvironmentalmonitoring AT sonjaengelhard spectroscopyinheterogenousmediaandapplicationsforbioprocessandenvironmentalmonitoring |