公开(公告)号：US20040169139A1

公开(公告)日：2004-09-02

申请号：US10796105

申请日：2004-03-10

Applicant: Hitachi, Ltd.

Inventor： Minoru Sakairi ,  Yoshiaki Kato ,  Mamoru Mizumoto ,  Yuichiro Hashimoto ,  Jiro Tokita ,  Masao Suga

IPC: H01J049/00

CPC classification number: G01N1/2258 ,  G01N33/0014 ,  G01N33/0047 ,  G01N33/0049 ,  H01J49/00 ,  Y10T436/19 ,  Y10T436/196666 ,  Y10T436/24

Abstract: There was previously no monitoring method and monitoring apparatus which could measure dioxins at ppt levels and dioxin precursors at ppb levels with high sensitivity. According to this invention, organic and inorganic compounds containing highly electronegative elements are selectively ionized by atmospheric pressure chemical ionization, the ions produced are detected by a mass spectrometer, and their amount is measured. As a result, interfering substances such as nitrogen, air, hydrocarbons and carbon dioxide which are the main components of flue gas are eliminated, and dioxins or organochlorine compounds such as dioxin precursors can be selectively monitored.

Abstract translation: 以前没有监测方法和监测仪器，可以以高灵敏度的ppb水平测量ppt水平的二恶英和二恶英前体。 根据本发明，通过大气压化学电离选择性地含有高电荷性元素的有机和无机化合物，通过质谱仪检测产生的离子，测量其量。 结果，除去作为烟气主要成分的氮，空气，碳氢化合物和二氧化碳等干扰物质，可以选择性地监测二恶英或有机氯化合物如二恶英前体。

公开(公告)号：US20020110490A1

公开(公告)日：2002-08-15

申请号：US10119844

申请日：2002-04-11

Applicant: Hitachi, Ltd.

Inventor： Minoru Sakairi ,  Yoshiaki Kato ,  Mamoru Mizumoto ,  Yuichiro Hashimoto ,  Jiro Tokita ,  Masao Suga

IPC: G01N033/00

CPC classification number: G01N1/2258 ,  G01N33/0014 ,  G01N33/0047 ,  G01N33/0049 ,  H01J49/00 ,  Y10T436/19 ,  Y10T436/196666 ,  Y10T436/24

Abstract: There was previously no monitoring method and monitoring apparatus which could measure dioxins at ppt levels and dioxin precursors at ppb levels with high sensitivity. According to this invention, organic and inorganic compounds containing highly electronegative elements are selectively ionized by atmospheric pressure chemical ionization, the ions produced are detected by a mass spectrometer, and their amount is measured. As a result, interfering substances such as nitrogen, air, hydrocarbons and carbon dioxide which are the main components of flue gas are eliminated, and dioxins or organochlorine compounds such as dioxin precursors can be selectively monitored.

Abstract translation: 以前没有监测方法和监测仪器，可以以高灵敏度的ppb水平测量ppt水平的二恶英和二恶英前体。 根据本发明，通过大气压化学电离选择性地含有高电荷性元素的有机和无机化合物，通过质谱仪检测产生的离子，测量其量。 结果，除去作为烟气主要成分的氮，空气，碳氢化合物和二氧化碳等干扰物质，可以选择性地监测二恶英或有机氯化合物如二恶英前体。

公开(公告)号：US20020048818A1

公开(公告)日：2002-04-25

申请号：US09987094

申请日：2001-11-13

Applicant: Hitachi, Ltd.

Inventor： Minoru Sakairi ,  Yoshiaki Kato ,  Mamoru Mizumoto ,  Yuichiro Hashimoto ,  Jiro Tokita ,  Masao Suga

IPC: G01N023/00

CPC classification number: G01N1/2258 ,  G01N33/0014 ,  G01N33/0047 ,  G01N33/0049 ,  H01J49/00 ,  Y10T436/19 ,  Y10T436/196666 ,  Y10T436/24

Abstract: There was previously no monitoring method and monitoring apparatus which could measure dioxins at ppt levels and dioxin precursors at ppb levels with high sensitivity. According to this invention, organic and inorganic compounds containing highly electronegative elements are selectively ionized by atmospheric pressure chemical ionization, the ions produced are detected by a mass spectrometer, and their amount is measured. As a result, interfering substances such as nitrogen, air, hydrocarbons and carbon dioxide which are the main components of flue gas are eliminated, and dioxins or organochlorine compounds such as dioxin precursors can be selectively monitored.