Assessing the composition of liquids,申请号AU19980070627-传众专利搜索

Assessing the composition of liquids

申请公布号：AU7062798(A)

申请号：AU19980070627

申请日期：1998.04.16

申请公布日期：1998.11.11

申请人：

PETER ALFRED PAYNE;RICHARD MARK DOWDESWELL;MOHAMMED EL HASSAN AMRANI

发明人：PETER ALFRED PAYNE;RICHARD MARK DOWDESWELL;MOHAMMED EL HASSAN AMRANI

分类号：G01N33/00;G01N27/02

主分类号：G01N33/00

摘要：A method for identifying a change in the composition of a liquid, comprising the steps of applying a time varying electrical or electromagnetic input signal to the liquid in a range of frequencies encompassing a resonant frequency of an electrical circuit comprising the liquid; measuring an impedance quantity of the electrical circuit comprising the liquid by means of the output signal as a function of the frequency of the time varying electrical or resonant frequency input signal in said range of frequencies; determining a resonant frequency of the electrical circuit comprising the liquid; after a change in the composition of the liquid, measuring variation in the impedance quantity at or near to the previously determined resonant frequency of the electrical circuit comprising the liquid; and relating the variation in the impedance quantity at or near to the resonant frequency of the electrical circuit comprising the liquid to a change in the composition of the liquid.