Use of an analytical photometer, of centrifugal type, for the practically simultaneous determination of the presence of different substances in a certain number of discrete samples

摘要

Analytical photometer for the practically simultaneous determination of the presence of different substances in a certain number of discrete samples. The photometer (10) is equipped with a centrifugal type rotor (16), already known in the art, containing a large number of chambers with inlet holes (20, 22) for the sample/samples and reagents and with axially aligned transparent windows, thereby forming a system of rotating cuvettes (18). The rotor compartments (16) serve as receptacles for the solutions and are designed and dimensioned as already known in the art, such as to retain the liquid when said rotor (16) is at rest and to transfer said liquid into the cuvettes (18) when the rotor (16) rotates. A single or multiple light source (L) is provided, which is transmitted in a novel manner through a system of suitable means, in particular, optical fibres (30-35) to various photodetector units (60 to 65), suitably aligned with the transparent windows of the cuvettes (18) by means of the same number of interference filters (50 to 55) and appropriate holes (40 to 45) situated in the base (15) of the rotor (16). Thus it is possible to determine for the first time, concentrations of chemical solutions through the absorbance in the sample/samples plus reagent/reagents contained in the cuvettes (18) at various wave lengths, with wave energy being delivered from source (L). …??Hence it is possible to examine more than one cuvette (18) almost simultaneously and singly, each one for a different analytical parameter, and consequently to examine the transmittance and/or absorbance of the samples contained in the cuvettes at optimum wave length.