| 摘要 |
PURPOSE: A device for measuring an absorption amount of a trace of a specimen is provided to measure an absorption amount while maintaining the concentration of a specimen desired to measure at ultra low concentration. CONSTITUTION: A device for measuring an absorption amount of a trace of a specimen comprises a QCM sensor(110), a sensing housing, a main transferring pipe(130), one or more branch pipes, a diffusion bulb, a plurality of valves, a pressure detecting unit, a frequency counter(190), and a calculation unit(195). The QCM sensor comprises an electrode formed on a crystal substrate. The sensor housing is installed in the inside of a first inner space so that the electrode of the QCM sensor is exposed. The sensor housing comprises an inlet. The first inner space and the outside are connected through the inlet. The main transferring pipe forms a main flow path by being connected to the inlet, thereby connecting to the first inner space of the housing from an input port where an inspection object specimen is installed. The branch pipes are branched from the main flow path. The diffusion bulb is joined to the branch pipes and provides a diffusion space where the specimen has flown can be stayed. The plurality of valves is installed in between the main transferring pipe and branch pipes, thereby controlling a transferring amount and a transferring passage of the specimen to the first inner space. The pressure detecting unit detects the pressure of the first inner space. The frequency counter detects resonant frequencies of the QCM sensor. The calculation unit calculates a specimen absorption amount of the QCM sensor by using input information of the pressure detecting unit and output signals of the frequency counter. [Reference numerals] (190) Frequency counter; (195) Calculation unit
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