2001
DOI: 10.1524/teme.2001.68.10.448
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In-situ-Analytik heterogener Medien mit frequenz- und leistungsmodulierten Diodenlasern (In-situ Analysis of Heterogeneous Media with Frequency and Intensity Modulated Diode Lasers)

Abstract: Die elektronische Leistungs-und Frequenzmodulierbarkeit von Diodenlasern eröffnet neue Perspektiven für eine Reihe von hochempfindlichen In-situ-Analyseverfahren. Besonders für ,,heterogene" Medien aus den Bereichen der chemischen Technologie, Biotechnologie und Biomedizin, die häufig Gas-, Flüssig-und Festphase nebeneinander enthalten und starke Lichtstreuung aufweisen, ergeben sich nicht-invasive und z. T. konkurrenzlose Analysetechniken. Mit leistungsmodulierten Lasern können in den Proben Photonendichtewel… Show more

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Cited by 3 publications
(1 citation statement)
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“…Thus, there is a basic limitation of GASMAS to translucent materials where some light, if only one per mille of the incident light, can emerge and be available for detection. Measurements of gas in polyurethane foams, which are translucent, were reported by Schael and Reich . Scattering and absorption in the host material mean that GASMAS samples are normally small, on the mm to dm scale, in contrast to LIDAR samples (atmospheres), where ranges of several km are not unusual.…”
Section: Basic Priniples Of Gas In Scattering Media Absorption Spectrmentioning
confidence: 97%
“…Thus, there is a basic limitation of GASMAS to translucent materials where some light, if only one per mille of the incident light, can emerge and be available for detection. Measurements of gas in polyurethane foams, which are translucent, were reported by Schael and Reich . Scattering and absorption in the host material mean that GASMAS samples are normally small, on the mm to dm scale, in contrast to LIDAR samples (atmospheres), where ranges of several km are not unusual.…”
Section: Basic Priniples Of Gas In Scattering Media Absorption Spectrmentioning
confidence: 97%