Piezosensor analysis of leucine and isoleucine solutions

摘要

This paper gives the results of the piezosensor analysis of leucine and isoleucine aqueous solutions. The obtained analytical signals for analytes differ significantly. This is connected with the fact that the piezosensor is not a mass-sensitive sensor in a solution but plays a role of an acoustic sensor, i.e. its signal is proportional to the properties of the investigated solutions. It was demonstrated that the difference between the quartz oscillation frequency in water and solution is a linear function of the square root out of the product of its viscosity and density (ηρ)~(1/2).