振動数差を用いる水晶重みセンサー

概要

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Two crystals with leading wires were set to parallel position having about 1 mm space and fixed on the edges with silicone resin. The inner space between the crystals was connected to the outer atmosphere with a narrow tube. The oneside of the sensor electrode was coated with the substrate reacting with the analyte to change the mass of the electrode and the other side was left uncoated. The frequencies of both crystals in the sensor and their difference were recorded on a computer. The frequency shifts depending upon the mass change of the electrode caused by the analyte to be determined in a solution and therefore the analyte could be determined as the frequency difference without any interfering effects of the solution properties, such as temperature, density, viscosity, specific conducitivity, etc., since the non-coated crystal of the sensor cancels the effects. The sensor was effective for the batch process at room temperature.
1989-07-05