The applicability of well-known three-parameter Hill equation for descripti
on of calibration curves for potentiometric (detection of glucose, pesticid
es, urea) and amperometric (detection of surfactants, biphenyl, nitrite) bi
osensors has been analyzed. The criterion for validity of the Hill equation
has been proposed. The sources of errors at the determination of concentra
tion of the substance being analyzed have been considered. (C) 2001 Elsevie
r Science B.V. All rights reserved.