In order to optimize the piezoelectric immunosensor for detecting mouse IgG aerosol

double polyaniline-phloroglucinol electropolymerized films（PA-PF） are designed.Firstly

a polyaniline film（PAF） is electropolmerized on gold electrode of piezoelectric crystal by cyclic voltammetry.Secondly

a phloroglucinol electropolymerized film is sedimentated on this PAF.Antibody against rat IgG is immobilized on the double films.And the new method of ultrasonic atomization is applied to produce IgG aerosol.By above method

a piezoelectric immunosenser is developed to detect rat IgG aerosol directly.Results show that the sensor has advantages of fast response to mouse IgG

detection time of 3 min and has better linearity relation

high stability

in the range of(0.42

4

.8 g·L

-1

)and long lifetime for above 60 d.