Measurement of te optical characteristics of a substance - using rapid sample and reference switching to avoid light source variations

摘要

To measure the real absorbance of a substance in a photometric sample cell (9), light is passed through three filters (F1,F2,F3) of differing wavelength contained in an array of commutators, which switch from filter to filter and form a sample cell to a reference cell, before reaching a photoelectronic measurement system. The accumulation of a series of sample and reference readings eliminates light source ageing and sample degradation effects. USE/ADVANTAGE - For discrete and continuous photometric analysis of liqs. The system eliminates light source and sample degradation effects.