Piezoelectric quartz crystal biosensors.

Immunosensor for the differentiation and detection of Salmonella species based on a quartz crystal microbalance

Detection of microorganisms using biosensors-a smarter way towards detection techniques.

Advances in the determination of inorganic anions by ion chromatography.

Development of a new atropine sulfate bulk acoustic wave sensor based on a molecularly imprinted electrosynthesized copolymer of aniline with o-phenylenediamine

Behaviour of a series piezoelectric sensor in electrolyte solution

A series electrode piezoelectric crystal sensor was used to determine Escherichia coliform (E. coli.). This method is simple and rapid, and requires only a single sample dilution. E. coli. in the range of 10 - 106 cells per ml can be estimated by this method. The procedure is a frequency detection time (FDT) method. The factors which affect the determination are discussed. Thirty samples in pure culture were tested by this method and the results fell within the 95% confidence limits of the standard plate count values. A correlation coefficient of 0.93 was obtained between the frequency detection time and logarithm of initial bacterial concentration. This corresponds to the criteria used to evaluate E. coli. with the added advantage of single dilution and more rapid results.

Rapid Detection of Escherichia Coliform Using A Series Electrode Piezoelectric Crystal Sensor

A new detector of water based on the piezoelectric crystal with separated electrode (PCSE) is proposed. The frequency response of the PCSE to the dielectric constant of nonelectrolyte solution is derived. The detector was applied to determine the microcontent of water in organic solvents. The detection limits are 0.022, 0.013 and 0.010 g/L in acetone, tetrahydrofuran, and dioxane, respectively. For the water content in ethanol, linear and nonlinear regression methods are employed, and the average relative errors of prediction are 1.67% and 2.77%, respectively

Piezoelectric detection of water with a separated electrode

BAW-based detectors can be divided into two classes: mass-effect-based and non-mass-effect-based BAW detectors. Only the non-mass-effect-based BAW detectors give satisfactory performance in eluent monitoring. Detector design and operation principle of the SPQC-BAW detector are described in detail in the present paper. Its applications in inorganic, organic and bio-medical analysis are summarized.

Wen-Hong Zhu

Papers

Behaviour of a series piezoelectric sensor in electrolyte solution

Rapid Detection of Escherichia Coliform Using A Series Electrode Piezoelectric Crystal Sensor

Piezoelectric detection of water with a separated electrode

Design and applications of a BAW-based detector for ion chromatography. A review

Piezoelectric quartz crystal with separated electrode for the simultaneous determination of atropine sulphate and sodium chloride