发明名称 |
GAS CHROMATOGRAPH MASS ANALYTICAL APPARATUS |
摘要 |
PURPOSE:To prevent error operation even if the vacuum degree in an exhaust pipe is changed, by opening and closing a precut valve only when a vacuum degree detecting signal in the exhaust pipe and an ion detecting signal from an ion source are simultaneously detected. CONSTITUTION:A solvent sent out from a column 3 is exhausted from an exhaust apparatus 5 but the not-exhausted solvent is introduced into an ion source 8 through a separator 7 and directly ionized to be emitted as ion beam. The part of this ion is detected by an ion detector 14 and this detected signal and the signal of a vacuum detecting element 11 are transmitted to a signal timing decision circuit 15 which in turn issues a pulse signal only when both signals are simultaneously transmitted and this pulse signal is transmitted to a timer 12 to open and close a precut valve 4. By this method, a signal is outputted from the circuit 15 only when a solvent is sent out from the column 3. |
申请公布号 |
JPS5918450(A) |
申请公布日期 |
1984.01.30 |
申请号 |
JP19820127708 |
申请日期 |
1982.07.23 |
申请人 |
HITACHI SEISAKUSHO KK |
发明人 |
MIMURA TADAO;NAKAGAWA KATSUHIRO |
分类号 |
H01J49/04;G01N27/62;G01N30/72 |
主分类号 |
H01J49/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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