公开(公告)号：US20090039250A1

公开(公告)日：2009-02-12

申请号：US12039762

申请日：2008-02-29

申请人： Masako ISHIMARU ,  Masuyoshi Yamada

发明人： Masako ISHIMARU ,  Masuyoshi Yamada

IPC分类号： H01J49/00

CPC分类号： H01J49/168 ,  G01N30/461 ,  G01N30/7213 ,  H01J49/147

摘要： In a mass spectrometer having ion sources capable of switching between atmospheric pressure chemical ionization and electron impact ionization, a first gas chromatography device capable of separating a sample to meet a condition suitable for atmospheric pressure chemical ionization measurement is connected to upstream of an atmospheric pressure chemical ionization ion source. Part of the sample separated by the first gas chromatography device is introduced to a second gas chromatography device by distributing a flow channel. In the second gas chromatography device, a target substance and background ingredients contained in the sample are further separated and are introduced to an electron impact ionization ion source. By separating the target substance from the background ingredients, an electron impact ionization spectrum of the target substance is obtained without an effect of the background ingredients.

摘要翻译： 在具有能够在大气压化学电离和电子轰击电离之间切换的离子源的质谱仪中，能够分离样品以满足适于大气压化学电离测量的条件的第一气相色谱装置连接到大气压化学品 电离离子源。 通过分配流动通道将由第一气相色谱装置分离的样品的一部分引入第二气相色谱装置。 在第二气相色谱装置中，将样品中所含的目标物质和背景成分进一步分离并引入电子轰击离子化离子源。 通过将目标物质与背景成分分离，可以获得目标物质的电子轰击电离光谱，而不影响背景成分。

公开(公告)号：US20070181801A1

公开(公告)日：2007-08-09

申请号：US11699366

申请日：2007-01-30

申请人： Masuyoshi Yamada ,  Masao Suga ,  Izumi Waki

发明人： Masuyoshi Yamada ,  Masao Suga ,  Izumi Waki

IPC分类号： H01J49/00

CPC分类号： H01J49/0422 ,  H01J49/107

摘要： A mass spectrometer capable of measuring under switching two ion sources at different pressure levels in which a sample gas separated by GC column is branched, and separately introduced to a first ion source (for example, APCI ion source) and a second ion source (for example, EI ion source) at a pressure level lower than that of the first ion source respectively. Preferably, the flow rate of the sample gas introduced to the APCI ion source is made more than the flow rate of the sample gas introduced to the EI ion source, so that the pressure for each of the ion sources can be maintained and analysis can be conducted by each ionization at a good balance in view of the sensitivity.

公开(公告)号：US20060054806A1

公开(公告)日：2006-03-16

申请号：US11071345

申请日：2005-03-04

申请人： Masuyoshi Yamada ,  Izumi Waki ,  Hideo Kasima

发明人： Masuyoshi Yamada ,  Izumi Waki ,  Hideo Kasima

IPC分类号： G01N27/62 ,  H01J49/04

CPC分类号： H01J49/0422 ,  G01N30/7213 ,  H01J49/145 ,  H01J49/168

摘要： A mass spectrometer has an atmospheric pressure chemical ionization source that includes a first ionization portion including a needle electrode, for generating a primary ion by discharge of the needle electrode a primary ion introduction aperture, and a second ionization portion including an introduction aperture, for generating a sample ion by the reaction between the primary ion and the sample gas introduced from an end of a column of gas chromatography, a sample ion movement aperture; and a mass analysis portion; wherein the end is arranged at a position satisfying the relation r≦2R where R is a radius of an inner diameter of the aperture and r is a distance between an axis connecting the center of the aperture and the center of the aperture, and the end.