公开(公告)号：US5803951A

公开(公告)日：1998-09-08

申请号：US826623

申请日：1997-04-03

申请人： Toyohito Wada ,  Kazuya Nakagawa ,  Satoru Miyoshi ,  Hiroyuki Tsujiide

发明人： Toyohito Wada ,  Kazuya Nakagawa ,  Satoru Miyoshi ,  Hiroyuki Tsujiide

IPC分类号： G01N30/12 ,  G01N30/02 ,  G01N30/10 ,  G01N30/32 ,  B01D15/08

CPC分类号： G01N30/32 ,  G01N2030/025 ,  G01N2030/127 ,  G01N30/10

摘要： A gas chromatograph has a control unit which normally carries out a pressure control so as to keep the pressure inside the vaporization chamber at a specified target level while the flow rate of a carrier gas into the vaporization chamber is kept constant. When a liquid sample is injected to cause a sudden rise in the pressure, the normal pressure control is temporarily stopped, say, for keeping the split ratio unchanged. In order to keep unchanged the retention time for components being analyzed although the pressure inside the vaporization chamber rises, the target value for the pressure control is reduced for an appropriate length of time after the temporary stopping of pressure control is discontinued.

摘要翻译： 气相色谱仪具有通常执行压力控制的控制单元，以便将进入汽化室的载气的流量保持恒定，从而将蒸发室内的压力保持在指定的目标水平。 当注入液体样品以引起压力突然升高时，暂时停止常压控制，例如为了保持分流比不变。 为了保持分析部件的保持时间，尽管蒸发室内的压力升高，但是在暂时停止压力控制之后，压力控制的目标值减少了适当的时间长度。