Analytical application of Cherenkov radiation

Studies were made to establish the possibilities and limitations of the photometric application of Cherenkov radiation. The colour quenching brought about by various coloured substances can be utilized for Cherenkov photometric measurements. The colour quenching is the strongest in the case of yellow, and the least strong for blue; accordingly, the slope of the linear logarithmic correlation between the efficiency and the concentration is higher for yellow than for blue. Glass and plastic vessels alike can be used for the measurements. The measurements have the greatest sensitivity in the case of the external standard. With the aid of an external standard, measurements of very high sensitivity can be made under isotope-free conditions.