JPS63148528A - Mass spectrometer - Google Patents

Mass spectrometer

Info

Publication number
JPS63148528A
JPS63148528A JP61296313A JP29631386A JPS63148528A JP S63148528 A JPS63148528 A JP S63148528A JP 61296313 A JP61296313 A JP 61296313A JP 29631386 A JP29631386 A JP 29631386A JP S63148528 A JPS63148528 A JP S63148528A
Authority
JP
Japan
Prior art keywords
ion
analysis
ion source
analysis pipe
potential
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP61296313A
Other languages
Japanese (ja)
Inventor
Yoshihiro Nukina
貫名 義裕
Morio Ishihara
石原 盛夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jeol Ltd
Original Assignee
Jeol Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jeol Ltd filed Critical Jeol Ltd
Priority to JP61296313A priority Critical patent/JPS63148528A/en
Publication of JPS63148528A publication Critical patent/JPS63148528A/en
Pending legal-status Critical Current

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  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

PURPOSE:To prevent a discharge between an analysis pipe and a connected equipment at the ground potential by insulating the analysis pipe from its circumference and applying the ion accelerating voltage to the analysis pipe. CONSTITUTION:An insulator 9 insulating an ion source 1 from an analysis pipe 8 and an insulator 10 insulating the analysis pipe 8 from a detector 7 are provided, and the analysis pipe 8 is also insulated from a magnet 5 by an insulator. Ions generated in an ionization chamber are extracted by the minimum required potential to positions of a slit group 3 and a main slit 4 and further guided into the analysis pipe 8 and accelerated by the potential applied to the analysis pipe 8. Since the ion accelerating voltage is applied to the analysis pipe 8, only the minimum required voltage may be applied to the ion source, and the potential difference between the ion source and an interface 12 and an LC 11 at the ground potential can be made incommensurably small. Accordingly, the danger of discharge is extremely small even if the pressure in the ion source becomes high.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は質量分析装置に関し、特に接続Il!器との放
電を防止することのできる質量分析装置に関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a mass spectrometer, in particular a connection Il! The present invention relates to a mass spectrometer that can prevent electrical discharge with a device.

[従来技術] 磁場型?[分析5A置のイオン源には、数KV〜10K
V程度のイオン加速電圧が印加される。一方、ガスクロ
マトグラフと質量分析装置を接続したGGMSや、液体
クロマトグラフと質量分析装置を接続したLCMSにお
いては、イオン源内に大量のガスや液体が導入される。
[Conventional technology] Magnetic field type? [The ion source for analysis at 5A is several KV to 10K.
An ion accelerating voltage of about V is applied. On the other hand, in a GGMS in which a gas chromatograph and a mass spectrometer are connected, and in an LCMS in which a liquid chromatograph and a mass spectrometer are connected, a large amount of gas or liquid is introduced into the ion source.

[発明が解決しようとする問題点〕 従って、これらの装置ではイオン源内の圧力が高くなる
ことが多く、イオン源内であるいはイオン源とそれらの
接続m器との間で放電が生じやすい。
[Problems to be Solved by the Invention] Therefore, in these devices, the pressure within the ion source is often high, and discharge is likely to occur within the ion source or between the ion source and the devices connected thereto.

放電が生じると分析に支障を来たすし、放電を防ぐため
イオン源内への気体や液体の導入口を制限すると充分な
強度のスペクトルが得られないという問題が発生する。
If discharge occurs, it will interfere with analysis, and if the inlet for gas or liquid into the ion source is restricted to prevent discharge, a problem arises in that a spectrum of sufficient intensity cannot be obtained.

本発明は上述した点に鑑みてなされたものであり、接続
機器との間の放電を防止できる質量分析装置を提供する
ことを目的としている。
The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a mass spectrometer that can prevent electrical discharge between connected devices.

[問題点を解決するための手段] この目的を達成するため、本発明は、イオン源と、該イ
オン源で生成されたイオンが導入される分析場と、該分
析場を通過したイオンを検出するイオン検出器と、前記
イオン源からイオン検出器までのイオン通路を真空に保
持するための分析管とを備えた質母分析装置において、
前記分析管を周囲と絶縁し、該分析管にイオン加速電圧
を印加するようにしたことを特徴としている。
[Means for Solving the Problems] In order to achieve this object, the present invention provides an ion source, an analysis field into which ions generated by the ion source are introduced, and a method for detecting ions that have passed through the analysis field. In a sample analyzer equipped with an ion detector and an analysis tube for keeping an ion passage from the ion source to the ion detector in a vacuum,
It is characterized in that the analysis tube is insulated from the surroundings and an ion accelerating voltage is applied to the analysis tube.

[作用1 本発明においては、分析管にイオン加速電圧を印加する
ため、イオン源には数10Vから数100V程度の必要
最小限の電圧を印加すれば良く、従って、通常接地電位
にある接続機器との間の放電を防止することができる。
[Operation 1] In the present invention, in order to apply an ion accelerating voltage to the analysis tube, it is sufficient to apply the minimum necessary voltage of several tens of volts to several hundreds of volts to the ion source. It is possible to prevent discharge between the

以下、図面を用いて本発明の一実施例を詳説する。Hereinafter, one embodiment of the present invention will be explained in detail using the drawings.

[実施例] 第1図は本発明を実施したLCMSの一例を示す概略図
である。第1図において1はイオン源、2はイオン化室
、3はスリット群、4は主スリット、5は分析磁場を発
生する磁石、6はコレクタスリット、7はイオン検出器
、8は分析管、9はイオン源と分析管との間を絶縁する
絶縁体、10は分析管と検出器7との間を絶縁する絶縁
体、11はLC,12はLC−MSインタフェース、1
3はイオン源電源、14はイオン加速電源、15〜17
は真空ポンプである。尚、図示しないが、分析管8と磁
石5の間も絶縁体によって絶縁されている。
[Example] FIG. 1 is a schematic diagram showing an example of an LCMS implementing the present invention. In Fig. 1, 1 is an ion source, 2 is an ionization chamber, 3 is a slit group, 4 is a main slit, 5 is a magnet that generates an analysis magnetic field, 6 is a collector slit, 7 is an ion detector, 8 is an analysis tube, 9 10 is an insulator that insulates between the ion source and the analysis tube, 10 is an insulator that insulates between the analysis tube and the detector 7, 11 is the LC, 12 is the LC-MS interface, 1
3 is an ion source power supply, 14 is an ion acceleration power supply, 15 to 17
is a vacuum pump. Although not shown, the analysis tube 8 and the magnet 5 are also insulated by an insulator.

上記構成において、分析管8.インタフェース12、イ
オン源10分析管8及びイオン検出器7の内部は真空ポ
ンプ15〜17によって排気され、各部に最適な圧りに
M持される。
In the above configuration, the analysis tube 8. The interiors of the interface 12, ion source 10, analysis tube 8, and ion detector 7 are evacuated by vacuum pumps 15 to 17, and maintained at optimal pressures for each part.

そして、正イオンを分析する場合、装置各部の電位は例
えば第2図(a)に示すように設定される。イオン化室
2.スリット8f3及び主スリット4から構成されるイ
オン源においては、イオントランスミッションを確保す
るために必要最小限の電位(例えばOv〜士数100v
程度)がイオン源電源13により与えられる。イオン化
室内で生成されたイオンは、この必要最小限の電位によ
ってスリット群3.主スリット4の位置へ引出され、更
に分析管8に与えられている一3KVの電位によって分
析管8内へ導入されて加速される。そして、イオンは分
析磁場によって質ffi電荷比に応じてコレクタスリッ
ト6上に展開され、特定のものだけがこのコレクタスリ
ットを通過して検出器7へ入射して検出される。
When positive ions are analyzed, the potentials of each part of the apparatus are set, for example, as shown in FIG. 2(a). Ionization chamber 2. In the ion source composed of the slit 8f3 and the main slit 4, the minimum potential (for example, Ov to 100v) is required to ensure ion transmission.
degree) is provided by the ion source power supply 13. The ions generated in the ionization chamber are moved to the slit group 3 by this minimum necessary potential. It is pulled out to the position of the main slit 4, and further introduced into the analysis tube 8 and accelerated by the 13 KV potential applied to the analysis tube 8. Then, the ions are spread onto the collector slit 6 according to the charge ratio by the analysis magnetic field, and only specific ions pass through the collector slit and enter the detector 7 to be detected.

このように、分析管8にイオン加速電圧を印加する本発
明では、イオン源部には必要最小、限の低い電圧を印加
すれば良いため、接地電位にあるインタフェース12や
LCI 1との間の電位差を従来よりも桁違いに小さく
し得る。そのため、イオン源内の圧力が高くなっても放
電する恐れは極めて小さくなり、大mの液体試料をイオ
ン源内へ導入することが可能となる。
As described above, in the present invention in which an ion accelerating voltage is applied to the analysis tube 8, it is sufficient to apply the minimum necessary and low voltage to the ion source, so that the voltage between the interface 12 and the LCI 1, which are at ground potential, is The potential difference can be made much smaller than before. Therefore, even if the pressure inside the ion source becomes high, the risk of discharge is extremely small, and it becomes possible to introduce a liquid sample of large m into the ion source.

第2図(b)は負イオンを分析する場合の装置各部の電
位を示し、同図(a)と極性が反転している。
FIG. 2(b) shows the potential of each part of the apparatus when analyzing negative ions, and the polarity is reversed from that of FIG. 2(a).

尚、イオン化室2の電位をVi  (正イオン分析の場
合はvl〉0、負イオン分析の場合にはVi〈0)1分
析管8の電位をVt  (正イオン分析の場合はvtく
01負イオン分析の場合にはvt>O)とすれば、分析
磁場に入射する時点でイオンが持つエネルギーはIVi
 −Vt lと表わされる。
Note that the potential of the ionization chamber 2 is set to Vi (vl>0 for positive ion analysis, Vi<0 for negative ion analysis), and the potential of the analysis tube 8 is set to Vt (vt01 negative for positive ion analysis). In the case of ion analysis, if vt > O), the energy of the ion at the time of entering the analysis magnetic field is IVi
−Vt l.

ここで、分析Wi場強度の最大値をallとした時、検
出できる最高の質R電荷比Mlは、kを定数として Mm −kBg+ 2 / I Vi  −Vt  1
となり、上式から、分析管の電位Vtを変えることによ
り測定質量範囲を任意に設定できることが分る。
Here, when the maximum value of the analysis Wi field strength is all, the highest quality R charge ratio Ml that can be detected is Mm - kBg+ 2 / I Vi - Vt 1 with k as a constant.
From the above equation, it can be seen that the measurement mass range can be arbitrarily set by changing the potential Vt of the analysis tube.

本発明においては、分析管に高電圧を印加するため、オ
ペレータや周囲の物品が分析管に直接触れないよう分析
管をカバーで囲ったり、絶縁フィルムを被せたりするこ
とが望まルいことは言うまでもない。
In the present invention, since a high voltage is applied to the analysis tube, it goes without saying that it is desirable to surround the analysis tube with a cover or cover it with an insulating film to prevent the operator and surrounding objects from directly touching the analysis tube. stomach.

[効果] 以上詳述した如く、本発明では、分析管を周囲と絶縁し
てイオン加速電圧を印加するようにしたため、イオン源
部分の電位を接地電位に近く設定することができ、各種
接続機器とイオン源との間の放電を防止することのでき
る質量分析装置が実現される。
[Effects] As detailed above, in the present invention, since the analysis tube is insulated from the surroundings and the ion accelerating voltage is applied, the potential of the ion source can be set close to the ground potential, and various connected devices can be A mass spectrometer is realized that can prevent discharge between the ion source and the ion source.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明を実施したLCMSの一例を示す概略図
、第2図は装置各部に与えられる電位を示す図である。 1:イオン源    2:イオン他室 3ニスリット群   4:主スリット 5:磁石      6:コレクタスリツト7:イオン
検出器  8:分析管 9.10:絶縁体  1にLC 12: LC−MSインタフェース 13:イオン源電源 14:イオン加速電源15〜17
:真空ポンプ
FIG. 1 is a schematic diagram showing an example of an LCMS embodying the present invention, and FIG. 2 is a diagram showing potentials applied to various parts of the device. 1: Ion source 2: Ion other chamber 3 Nislit group 4: Main slit 5: Magnet 6: Collector slit 7: Ion detector 8: Analysis tube 9.10: Insulator 1: LC 12: LC-MS interface 13: Ion source power supply 14: Ion acceleration power supply 15 to 17
:Vacuum pump

Claims (1)

【特許請求の範囲】[Claims] イオン源と、該イオン源で生成されたイオンが導入され
る分析場と、該分析場を通過したイオンを検出するイオ
ン検出器と、前記イオン源からイオン検出器までのイオ
ン通路を真空に保持するための分析管とを備えた質量分
析装置において、前記分析管を周囲と絶縁し、該分析管
にイオン加速電圧を印加するようにしたことを特徴とす
る質量分析装置。
An ion source, an analysis field into which ions generated by the ion source are introduced, an ion detector that detects the ions that have passed through the analysis field, and an ion path from the ion source to the ion detector that is maintained in a vacuum. What is claimed is: 1. A mass spectrometer comprising an analysis tube for analyzation, wherein the analysis tube is insulated from the surroundings and an ion accelerating voltage is applied to the analysis tube.
JP61296313A 1986-12-12 1986-12-12 Mass spectrometer Pending JPS63148528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61296313A JPS63148528A (en) 1986-12-12 1986-12-12 Mass spectrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61296313A JPS63148528A (en) 1986-12-12 1986-12-12 Mass spectrometer

Publications (1)

Publication Number Publication Date
JPS63148528A true JPS63148528A (en) 1988-06-21

Family

ID=17831929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61296313A Pending JPS63148528A (en) 1986-12-12 1986-12-12 Mass spectrometer

Country Status (1)

Country Link
JP (1) JPS63148528A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009540529A (en) * 2006-06-13 2009-11-19 セムイクウィップ・インコーポレーテッド Magnetic analysis apparatus and method for ion implantation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009540529A (en) * 2006-06-13 2009-11-19 セムイクウィップ・インコーポレーテッド Magnetic analysis apparatus and method for ion implantation

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