Photon-Correlation Spectrometer
PHOTOCOR Complex

We introduce a simple-to-use photon-correlation spectrometer PHOTOCOR Complex (an advanced version of the UNICOR Complex spectrometer) for basic and applied studies in physics, chemistry, biology, medicine, engineering, and environmental technology as well as for educational purposes in these subjects. The technique enables one to measure the size of particles suspended in liquids in the range from 0.001 to 5 microns without any calibration. The measurements are fast, lasting usually from seconds to several minutes. The real-time size monitoring, such of a kinetic aggregation process, is also possible. The optical arrangement of the spectrometer makes it even possible to measure light scattering in opaque systems characterized by strong light absorption. The quantity of the sample to be studied can be quite small, starting from 0.01 cm³. The setup comes with a specially disigned software for Windows 3.1, Windows 95, or Windows NT, that performs initial data interpretation and fitting procedures, exchange of data with other programs, and automation of long-lasting measurements. The accuracy of the results has been verified by measuring light scattering in a variety of systems, such as latex suspensions, aniline dye dissolved in water, and dilute solutions of polysterene in toluene.