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...was described in an earlier issue of Designed to measure moisture levels in ultra-high-purity (UHP) nitrogen and argon gases, the monitor uses a piezoelectric quartz crystal microbalance (QCM) sensor. The quartz crystal is coated with a thin film of barium metal, with which moisture reacts irreversibly... the oscillation as a sample interacts with the surface of the sensor. The quartz crystal microbalance-dissipation (QCM-D) technique has numerous applications, according to business development manager Goran Zelander, notably in the fields of medical diagnostics and biomaterials. The sensor...

Issue. Editorial Calendar. Home \. Magazines \. Medical Device & Diagnostic Industry. Originally Published MDDI October 2002 NEWS & ANALYSIS Industry Confronts Challenge from New Testing Standard. Leslie Laine. Meeting chemical characterization requirements will involve such tests as quartz crystal...

...resonance, atomic force microscopy, and techniques that measure mass increases upon hybridization (e.g., quartz crystal microbalance, cantilevers).2-8 While each methodology has advantages and disadvantages, the only technique that has been commercially successful is fluorescence. Figure 2. Detection...

...or a combination of methods, including limiting the amount of dimer, pressure monitoring with feedback control of the sublimation heater and active in-situ film-thickness monitoring such as quartz crystal microbalance. The process is friendly in that any material that can survive exposure to low vacuum...

...this effect has many useful applications, and piezoelectric sensors and actuators are used in various devices, including microphones, compact disc players, accelerometers, quartz crystal microbalances, and pressure monitors. Perhaps the most common application is found in electric lighters, in which...

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