TY  - JOUR
A1  - Schael, Frank
A1  - Reich, Oliver
A1  - Löhmannsröben, Hans-Gerd
T1  - Near infrared diode laser spectroscopy of organic compounds in turbid aqueous solutions
N2  - 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 highly scattering solutions. Applicability of theoretical approaches were established by investigating model systems with absorbing (e.g. ink, malachite green) and scattering (e.g. milk powder, caolinit) species in aqueous solution. While diffuse reflectance measurements practically requires calibration procedures, photon migration studies allow quantitative determination of absorption and scattering coefficients of turbid solutions consistent with absorptions coefficients obtained from Lambert-Beer's law. Furthermore, NIR absorption spectra of water, chlorinated hydrocarbons (chloroform, 1,2-dichloroethane, trichloroethene) and of various sugars ($alpha$-D-glucose, sucrose, maltose) are discussed. Spectral variations of NIR water absorption with temperature and solvents are exammined. Exemplary, NIR diode laser detection of water in acetone/water mixtures is performed.
Y1  - 2000
SN  - 0-9528666-1-7
ER  - 
TY  - JOUR
A1  - Löhmannsröben, Hans-Gerd
A1  - Schael, Frank
A1  - Reich, Oliver
A1  - Lemke, Matthias
A1  - Schober, Lars
T1  - Untersuchung von organischer Bodensubstanz und Bodengasen mit laser-spektroskopischer in-situ Meßtechnik
Y1  - 2000
ER  - 
TY  - CHAP
A1  - Asche, Hartmut
A1  - Böckmann, Christine
A1  - Laue, Steffen
A1  - Löhmannsröben, Hans-Gerd
A1  - Lemke, Matthias
A1  - Schober, Lars
A1  - Reich, Oliver
A1  - Lück, Erika
A1  - Schütte, Marc
A1  - Domsch, Horst
A1  - Makower, Alexander
A1  - Scheller, Frieder W.
A1  - Stöcklein, Wolfgang
A1  - Wollenberger, Ursula
A1  - Schultze, Rainer
A1  - Hengstermann, Theo
A1  - Schael, Frank
T1  - Umweltforschung für das Land Brandenburg : Projekt Umweltanalytik / Umweltmeßtechnik / Informationssysteme
Y1  - 2000
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-3862
SP  - 176
EP  - 227
ER  -