Patent ID: 9360409
Filing Date: 2016-06-07
CPC Classification: G01N,G06F

Claim Text:
1. A method for measuring a viscoelastic modulus of a substance comprising the steps of: submerging both sides or one side of a sensor with a piezoelectric element in a solution; adsorbing the substance to a surface of the piezoelectric element or to a film fixed onto the piezoelectric element in the solution; measuring at least two of a resonance frequency F executing first to sixth calculation steps by using the values measured in the measuring step to calculate the viscoelastic modulus of the adsorbed substance by an arithmetic means, wherein the first calculating step is a step calculating a constant C based on an equation obtained by a value obtained by making division of respective ΔF the second calculating step is a step calculating a viscoelastic term (2) by substituting ΔF the third calculating step is a step calculating a viscoelastic term (1) by substituting the viscoelastic term (2) obtained in the second calculating step into Equation 5 obtained by substituting Equation 4 into the viscoelastic term (1) in Equation 3, Equation 4 Equation 5 the fourth calculating step is a step calculating a mass load in the Equation 3 based on a variation ΔF the fifth calculating step is a step calculating a viscoelastic term (3) in Equation 6 based on a variation ΔF the sixth calculating step is a step calculating the viscoelastic moduli G′ (storage elastic modulus) and G″ (loss elastic modulus) based on Equation 7 and Equation 4, wherein ΔF