Um fotômetro de fluxo para análises clínicas a base de um diodo emissor de luz bicolor

Abstract

Recebido em 21/3/96; aceito em 13/11/96 AN INEXPENSIVE FLOW PHOTOMETER FOR CLINICAL ANALYSIS BASED ON A BICOLOUR LIGHT EMITTING DIODE. The construction and evaluation of an inexpensive flow photometer for clinical analysis, using a bicolour LED and a phototransistor adapted for tubular flow cell, are described. The instrument presents some new features such as: automatic zero, elec-tronic calibration and peak-hold signal. When compared with a classical photometer, it is simpler and has the advantages of a flow analysis system: lower volumes of reagents and samples, lower levels of contamination, shorter time for analysis and lower analysis costs. The instrument was used in the determination of the constituents in blood samples. The results obtained agree with those obtained by a classical photometer and the precision was better.