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11. 发明授权

US10739309B2 Dielectric barrier discharge ionization detector 有权
公开(公告)号：US10739309B2
公开(公告)日：2020-08-11
申请号：US15698331
申请日：2017-09-07
申请人： Shimadzu Corporation , Osaka University
发明人： Kei Shinada , Katsuhisa Kitano
IPC分类号： G01N27/70 , G01N30/54 , G01N30/64 , H05H1/24 , G01N27/66 , G01N30/02 , G01R19/00
摘要： A dielectric barrier discharge ionization detector capable of achieving a high signal-to-noise ratio is provided. The detector includes: a discharging section for generating plasma from argon-containing gas by electric discharge; and a charge-collecting section for ionizing a component in a sample gas by an effect of the plasma and for detecting ion current formed by the ionized component. The discharging section includes a cylindrical dielectric tube having a high-voltage electrode connected to AC power source as well as upstream-side and downstream-side ground electrodes and formed on its outer circumferential wall. A semiconductor film is formed on the inner circumferential surface of the tube. The upstream-side and downstream-side ground electrodes are respectively made longer than the initiation distances for a creeping discharge between the high-voltage electrode and a tube-line tip member as well as between the high-voltage electrode and the charge-collecting section.

12. 发明授权

US10436751B2 Dielectric barrier discharge ionization detector 有权
公开(公告)号：US10436751B2
公开(公告)日：2019-10-08
申请号：US15698368
申请日：2017-09-07
申请人： Shimadzu Corporation
发明人： Kei Shinada
IPC分类号： G01N27/68 , G01N27/60 , G01N27/70 , G01N30/64 , G01N33/00 , G01N30/02 , G01R19/00
摘要： A dielectric barrier discharge ionization detector Includes: a dielectric tube; a high-voltage electrode connected to an AC power source and circumferentially formed on the outer wall of the dielectric tube; upstream-side and downstream-side ground electrodes and circumferentially formed above and below the high-voltage electrode; a discharging section for generating electric discharge to create plasma, from a gas containing argon; and a charge-collecting section for ionizing sample-gas components by the plasma and detecting an ion current formed by the ionized components. The detector also satisfies one or both of the following conditions: the upstream-side ground electrode is longer than a creeping discharge initiation distance between a tube-line tip member at the upper end of the dielectric tube and the high-voltage electrode; or the downstream-side ground electrode is longer than a creeping discharge initiation distance between the high-voltage electrode and the charge-collecting section.

13. 发明授权

US10161906B2 Dielectric barrier discharge ionization detector and method for tuning the same 有权
公开(公告)号：US10161906B2
公开(公告)日：2018-12-25
申请号：US14611516
申请日：2015-02-02
申请人： SHIMADZU CORPORATION
发明人： Kei Shinada , Shigeyoshi Horiike
IPC分类号： G01N27/68 , G01N33/00 , G01N27/70 , G01N30/64
摘要： To widen the dynamic range of a dielectric barrier ionization detector (BID), an insertion length of a sample injection tube 16 into a second gas passage 11 is set so that a sample-gas ejection port 16a is located on the downstream side of a dilution gas from the upper edge of a collector electrode 14 at which a DC electric field concentrates. By this setting, although the detection sensitivity is lower than in the case where the sample-gas ejection port 16a is placed to maximize the detection sensitivity, the decrease in the detection sensitivity to high-concentration samples is reduced since absorption of light by the sample gas is alleviated. Consequently, the sample-concentration range with a linearly-changing sensitivity becomes wider than that of conventional BIDs. Although the detection sensitivity becomes lower than that of conventional BIDs, a detection sensitivity adequately higher than that of FIDs can be ensured.

14. 发明授权

US09784714B2 Discharge ionization current detector and tuning method for the same 有权
公开(公告)号：US09784714B2
公开(公告)日：2017-10-10
申请号：US14766914
申请日：2013-02-15
申请人： SHIMADZU CORPORATION
发明人： Kei Shinada , Shigeyoshi Horiike
IPC分类号： G01N27/70 , G01N30/64
CPC分类号： G01N27/70 , G01N30/64
摘要： An adjusting method for a discharge ionization current detector of the present invention is provided for a discharge ionization current detector for a gas chromatograph, which improves the precision and reproducibility of measurements results of the detector. The discharge ionization current detector adjusts at least one of purity of introduced helium gas, a flow rate of the introduced helium gas, an amplitude of voltage of the low-frequency dielectric barrier discharge, and a frequency of the voltage of the low-frequency dielectric barrier discharge so that intensity of light having a wavelength of 640 nm reaches the maximum in a range of wavelengths of 250 to 700 nm with respect to light emitted by the helium plasma.

15. 发明申请

US20150042354A1 ANALYSIS DEVICE PROVIDED WITH DISCHARGE IONIZATION CURRENT DETECTOR 有权
标题翻译：具有放电电流检测器的分析装置
公开(公告)号：US20150042354A1
公开(公告)日：2015-02-12
申请号：US14384049
申请日：2013-02-20
申请人： SHIMADZU CORPORATION
发明人： Kei Shinada , Shigeyoshi Horiike , Takahiro Nishimoto
IPC分类号： G01N30/64 , G01N27/70
CPC分类号： G01N30/64 , G01N27/70 , G01N2030/645 , G01N2030/8813
摘要： An analysis device comprising a discharge ionization current detector, a plasma gas supply section, a sample gas supply section, a flow rate setting condition holding section and a gas flow rate setting means controller. The flow rate setting condition holding section holds, as a flow rate setting condition, a relationship between a sample gas supply flow rate from the sample gas supply section and a supply flow rate of plasma gas to be set with respect to the sample gas supply flow rate and the gas flow rate controller is configured to set a plasma gas supply flow rate from the plasma gas supply section to a flow rate according to the sample gas supply flow rate, based on the flow rate setting condition held in the flow rate setting condition holding section.
摘要翻译：一种分析装置，包括放电电离电流检测器，等离子体气体供给部，样品气体供给部，流量设定条件保持部和气体流量设定装置控制部。流量设定条件保持部将作为流量设定条件的样品气体供给部的样品气体供给流量与对样品气体供给流量设定的等离子体气体的供给流量的关系进行保持速率和气体流量控制器被配置为基于保持在流量设定条件下的流量设定条件，将等离子体气体供给部的等离子体气体供给流量设定为根据取样气体供给流量的流量持有部分。

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