| 摘要 |
PROBLEM TO BE SOLVED: To provide an ion source for gas chromatograph mass spectrometer, which has a structure such that an ionization chamber can be replaced at once without using a tool or the like by eliminating the complication of attaching or detaching operation of a gas connection part in replacement of the ionization chamber. SOLUTION: A base chamber includes a strut for fixing and supporting an ion source block, and the ion source block includes an ionization chamber, a vertical hole for receiving the strut, a gas chromatograph connection part protruding in a direction of crossing the strut, and two insulating receivers for receiving two universal joints of a standard sample gas inlet connection part. When the ion source block is fixed to the base chamber, the two universal joint protruded at a predetermined sector angle are allowed to abut on the two insulating receivers, and the ion source block is moved so as to draw a circular arc relative to the base chamber with the abutting part as a fulcrum to fit the strut to the vertical hole. COPYRIGHT: (C)2010,JPO&INPIT
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