MOISTURE MEASURING METHOD

PURPOSE:To measure the moisture in a gas quickly and selectively without requiring any reagent by bringing the gas to be measure into contact with a quartz oscillator coated with bacteriorhodopsin. CONSTITUTION:5mg of bacteriorhodopsin is added with 1ml of water to prepare 5mg/ml of water suspension...

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Bibliographic Details
Main Authors KATOU HIROMASA, TANAKA MASUKO
Format Patent
LanguageEnglish
Published 14.11.1995
Edition6
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:PURPOSE:To measure the moisture in a gas quickly and selectively without requiring any reagent by bringing the gas to be measure into contact with a quartz oscillator coated with bacteriorhodopsin. CONSTITUTION:5mg of bacteriorhodopsin is added with 1ml of water to prepare 5mg/ml of water suspension. It is then dripped by 5mul onto one side of a quartz oscillator and dried by leaving it t room temperature to produce a film of bacteriorhodopsin of about 10mum thick. The quartz oscillator is then secured to the upper end of a cylindrical vessel having sample gas inlet and outlet and a resonance frequency F1 is determined while supplying the dehydrated atmosphere at a rate of 1l/min. A resonance frequency F. is measured again while supplying the atmosphere at a rate of 1l/min in order to determine the content of moisture in the atmosphere according to a formula F2-F1=DELTAF. This method realizes quick and reversible response thus realizing quick and selective measurement without requiring any reagent.
Bibliography:Application Number: JP19940094903