Influence of oscillator phase on oscillation frequency and sensitivity of an electrode-separated piezoelectric sensor

作     者：Shen, DZ Kang, Q Hu, JT 

作者机构：SHANDONG UNIVCHEM COLLJINAN 250100SHANDONGPEOPLES R CHINA 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：1996年第14卷第3期

页      面：235-243页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：Project supported by the National Natural Science Foundation of China 

主　　题：piezoelectric sensor oscillator phase oscillation frequency liquid properties 

摘      要：Theoretical consideration was proposed for the influences of the oscillator phase on the response nature of an electrode-separated piezoelectric sensor (ESPS) to liquid properties and verified experimentally. For the oscillators with different phases, the oscillation frequency of the ESPS may increase, maintain nearly constant or decrease with increasing conductivity in low conductivity solutions. The sensitivity of response to density and viscosity increases slightly with increasing oscillator phase. The response to permittivity depends hardly on the oscillator phase. In addition, the dependence of the oscillation frequency of the ESPS on the supply voltage of the oscillator was explained. The ESPS was used to determine atropine sulfate with a detection limit of 1.6x10(-7) mol/L.