Biophysics / Internet Invited Lecture
MEASURING OF OPTICAL PROPERTIES OF BIOLOGICAL SAMPLES BY LOW- COST GONIOMETRICAL EQUIPMENT
M. Hoffmann, O. Schewtschenko, Bad Langensalza, Germany
O. Minet, Berlin, Germany
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DiscussionABSTRACT
The determination of the optical parameters is of the importance for the analysis of turbid media. In combination with mathematical modelling, these data is a starting point for the optical diagnosis methods in medicine and also for quality assurance in the food industry as well as in environmental monitoring. A well-known that the turbidimetry, 90°-light scattering measurement and light scattering goniometry belong to the established methods. Usually goniometry methods are used for the determination of the scattering phase function in the media with the low concentrations of the suspended particles. With the help of our experimental arrangement we show that the optical parameters of the media with high concentrations of the suspended particles can be also measured using the goniometer. The mathematical analysis of our data is based on a data base which was generated with extensive Monte Carlo simulations. An adapted least square method allows an on-line analysis. For demonstration of effectiveness of arrangement, homogenized whole milk and milk diluted with water in several concentrations was analysed. Optical parameters of milk were calculated and compared with the literature data.
Representing Author:
Olga Schewtschenko, fzmb e.V., research fellow (Bad Langensalza, Germany)
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