Multichannel bacterial growth analyser by impedance and turbidity

MADRID, ROSSANA ELENA; VERCELLONE, MARÍA ISABEL; FELICE, CARMELO JOSÉ; VALENTINUZZI, MÁXIMO EUGENIO

Medical & Biological Engineering &Computing

Año: 1994 vol. 32 p. 670 - 672

Turbidimetry is one of teh traditional methods used in microbiology to obtain bacterial growth curves. Electrical impedance has been proposed as a convenient alternative. Our objetive was to implement simultaneously both methods whileseparating the three components (bulk resistance, interface resistance and interface capacitive reactance) from the total imnpedance measured during growth between the two electrodes immersed in the medium, based on previously obtained results. The only antecedent, to the best knowledge, is previous work which, making use of a tetrapolar technique, compared turbidimetric and impedancimetric bacterial growth curves.