Multichannel quartz crystal microbalance detection device

Abstract

The invention discloses a multichannel quartz crystal microbalance detection device which comprises an upper needle probe, a lower needle probe, a base, a quartz wafer, a silica gel gasket and a sealing cover, wherein the upper surface of the base is provided with a base groove; the quartz wafer is embedded in the base groove; the lower surface of the quartz wafer is provided with a plurality of quartz wafer grooves of which the openings are downward; the lower surface of the quartz wafer is coated with a layer of lower electrode; the leading edge in the corresponding position on the back side of each quartz wafer groove is coated with an upper electrode; the silica gel gasket is arranged on the base; a vertically-penetrated central long through hole is arranged on the silica gel gasket in a position corresponding to the quartz wafer groove; the sealing cover is positioned on the silica gel gasket; the sealing cover is respectively provided with a sample inlet channel and a sample outlet channel; the upper needle probe is connected with the upper electrode through the sealing cover and the silica gel gasket; and the lower needle probe is connected with the lower electrode through the base. The detection device can simultaneously detect different components in multiple substances to be detected, and improves the detection precision.

Description

technical field [0001] The invention relates to the technical field of sensing and detection, in particular to a multi-channel quartz crystal microbalance detection device with a reference. Background technique [0002] Quartz crystal microbalance (QuartzCrystalMicrobalance, QCM) is a sensor that detects trace substances based on the change of the resonance frequency caused by the change of the attachment mass on the wafer surface. It has the advantages of high sensitivity, simple structure, low cost, and especially does not require sample marking. Biology, chemistry and other fields have been widely used as detection and analysis tools. Quartz crystal microbalance is composed of an AT-cut quartz wafer and metal excitation electrodes fixed on both sides of the wafer. The excitation electrodes are generally derived from two socket pins welded on both sides of the chip respectively, and connected to the test instrument or the resonant circuit. [0003] The combination of qua...

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Problems solved by technology

The design structure of the current flow cell is relatively complicated, and the installation is troublesome, so that the flow cell cannot be reused

[0004] At present, the basic frequency of commonly used microbalances on the market is 5MHz or 10MHz, the chip thickness is 0.33mm or 0.17mm, and the diameter is about 15mm. or trace substances for detection

At present, most of the quartz crystal microbalances in use or even in research are of a single microbalance structure, which cannot quantitatively analyze the influence of changes in the environment and the properties of the object to be measured on the measurement results, which limits the lower limit of measurement, so the measurement accuracy remains to be seen. improve

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