JPH06213870A - Ion source for mass spectrometer - Google Patents

Ion source for mass spectrometer

Info

Publication number
JPH06213870A
JPH06213870A JP5007341A JP734193A JPH06213870A JP H06213870 A JPH06213870 A JP H06213870A JP 5007341 A JP5007341 A JP 5007341A JP 734193 A JP734193 A JP 734193A JP H06213870 A JPH06213870 A JP H06213870A
Authority
JP
Japan
Prior art keywords
sample
ionization
ion source
solvent
mass spectrometer
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
JP5007341A
Other languages
Japanese (ja)
Inventor
Naoto Senda
直人 千田
Kenichi Shizukuishi
賢一 雫石
Toshiaki Takahashi
利明 高橋
Tomomi Bando
智美 板東
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.)
Hitachi Instruments Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Instruments Engineering Co Ltd
Hitachi 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 Hitachi Instruments Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Instruments Engineering Co Ltd
Priority to JP5007341A priority Critical patent/JPH06213870A/en
Publication of JPH06213870A publication Critical patent/JPH06213870A/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 contamination of continuous frit fab(CFF) and enable long-term-stable operation and highly sensitive measurement of a highly polar substance from nonpolarity eluted from liquid chromatogram. CONSTITUTION:A sample and a matrix made to flow from liquid chromatogram 9 is split by a splitter 16 and reaches a porous ionization mount 7, where they are ionized by a primary ion beam 6 applied from a primary ion beam generator 5 and subjected to mass scattering by a mass analysis system 1. Contamination on the porous ionization mount 7 generated at this time is cleaned by solvent which is supplied from inactive gas 12 and heated by a heater 13.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は質量分析計に係わり、特
に液体クロマトグラムからの流出する無極性試料から高
極性試料まで効率良くイオン化する装置の改良に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mass spectrometer, and more particularly to improvement of an apparatus for efficiently ionizing nonpolar samples flowing out from a liquid chromatogram to highly polar samples.

【0002】[0002]

【従来の技術】液体クロマトグラムで分離された試料液
を質量分析装置のイオン源内に直接導入してイオン化す
る手法のポピュラーなものとしてコンティニアスフリッ
トファブ(CFF)があり、そのイオン化はアルゴン,
キセノン等を一次イオン種とする一種のFABイオン化
で、液体クロマトグラムで分離された試料は移動相と一
緒になって流出して来るが、その一部をイオン化のため
の添加剤(グリセロール他)等を加えた後、多孔性部材
の設置したところまで導入し、小さな穴よりにじみ出さ
せる。多孔性部材よりにじみ出たイオン化添加剤(マト
リックス)と試料は、一次イオンビーム発生器より発生
イオンビームにより試料はイオン化され、試料イオンビ
ームとなり、質量分析系に送られ分析される。この様な
従来の装置では、各種マトリックス,試料中の不純物等
がコンタミとなって多孔性部材の上に溜り、バックグラ
ウンドが増加し、長時間の測定は不可能であった他、無
極性の試料のイオン化にはこの方法ではイオン化でき
ず、GC/MS等での測定を必要とした。
2. Description of the Related Art A continuous frit fab (CFF) is a popular method of directly introducing a sample solution separated by a liquid chromatogram into an ion source of a mass spectrometer to ionize it.
By FAB ionization, which uses xenon as the primary ion species, the sample separated by the liquid chromatogram flows out together with the mobile phase, but part of it is an additive for ionization (glycerol, etc.). Etc. are added, and then the material is introduced to the place where the porous member is installed and exudes from a small hole. The ionizing additive (matrix) exuding from the porous member and the sample are ionized by the ion beam generated by the primary ion beam generator to become the sample ion beam, which is sent to the mass spectrometric system for analysis. In such a conventional device, various matrices, impurities in the sample, etc., become contaminants and accumulate on the porous member, the background increases, and it is impossible to measure for a long time. Ionization of the sample was not possible with this method, and measurement by GC / MS or the like was required.

【0003】[0003]

【発明が解決しようとする課題】上記従来技術は、イオ
ン化のためのマトリックスによるイオン源内イオン化部
の汚れには何等配慮されていなかった。また液体クロマ
トグラムからの試料は無極性から高極性と幅広い試料を
対象としているが、従来のイオン化であるFABの様な
イオン化は無極性から低極性の試料のイオン化は不可能
であり、液体クロマトグラムから流出する試料の一部し
か測定できないという問題点があった。
In the above-mentioned prior art, no consideration was given to the contamination of the ionization part in the ion source with the matrix for ionization. In addition, samples from liquid chromatograms target a wide range of samples from non-polar to high-polarity, but conventional ionization such as FAB cannot ionize non-polar to low-polarity samples. There is a problem that only a part of the sample flowing out from the gram can be measured.

【0004】本発明は溶媒による多孔性イオン化台の洗
浄と無極性から低極性試料の電子衝撃イオン化をするこ
とを目的としており、さらに無極性から高極性物質の安
定したイオン化を提供することを目的としている。
The present invention is intended to wash a porous ionization table with a solvent and to perform electron impact ionization of a non-polar to low-polarity sample, and further to provide stable ionization of a non-polar to high-polarity substance. I am trying.

【0005】[0005]

【課題を解決するための手段及び作用】上記目的を達成
するため、本発明では試料が液体クロマトグラムで分離
された後、スプリットされ液体クロマトグラムより流出
したうちの一部の試料およびマトリックスがイオン源の
多孔性イオン化台のところまで押し出されイオン化され
るが、その経路上に多孔性イオン化台に付着したマトリ
ックスや試料を洗い流すのに必要な溶媒を注入、なおか
つ温度を上げることによりコンタミ物質の溶解度を上げ
る。また無極性から低極性の試料のイオン化は電子衝撃
法がそのスペクトルの感度,情報量から最良の方法であ
り、そのためには洗浄溶媒を流している経路より
“N2 ”“He”等のガスを流し、ヒータにより加熱
後、多孔性イオン化台に向け放射することにより、それ
らの試料を気化分子状にし、多孔性イオン化台近傍に設
置したフィラメントより生成される電子流により、試料
分子はイオン化され分析系で分析される。
In order to achieve the above object, in the present invention, after a sample is separated by a liquid chromatogram, a part of the sample and matrix out of the split and flowing out from the liquid chromatogram is ionized. It is extruded to the source porous ionization table and ionized, but the solvent necessary for washing away the matrix and sample adhering to the porous ionization table is injected into the path, and the solubility of contaminants is increased by raising the temperature. Raise. The ionization sensitivity of the spectrum is electron impact of low polarity samples from non-polar, is the best way from the information amount, gas such as "N 2" "He" than the path for its are flowing cleaning solvent The sample molecules are ionized by the electron flow generated by the filaments installed near the porous ionization table by irradiating the sample to the porous ionization table and radiating it toward the porous ionization table. It is analyzed by the analysis system.

【0006】[0006]

【実施例】以下、本発明の一実施例を図1より説明す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

【0007】液体クロマトグラム9より分離されて流出
した試料と移動相とマトリックスは、スプリッター16
でスプリットされその一部はイオン源内に設置されたイ
オン化室の多孔性イオン化台ににじみ出て来る。この多
孔性イオン化台の上には一次イオンビーム発生器より生
成されたキセノン、アルゴン等のイオンが照射される事
により試料イオンビーム8となって質量分析計へ送られ
分析される。本装置の様なCFFイオン化では各種マト
リックス,試料,試料中の不純物等が多孔性イオン化台
の上に蓄積し、バックグラウンドを増加させるはほか、
装置が不安定となり、長時間安定した測定は不可能であ
る。また液体クロマトグラムより流出する試料は無極性
から高極性と幅が広いが、CFF等のイオン化は高極性
の物質は比較的イオン化されやすいが、無極性から低極
性の物質はほとんどイオン化されず、LC/MSとして
の機能を完全に果たせなかった。本特許では多孔性イオ
ン化台7のクリーニングにはクリーニング溶媒11より
マトリックス、試料のコンタミ物質等を溶解する溶媒を
流し、流路途中に設置されたヒータ13により溶媒の温
度を上げ、試料等の溶解度を上げることにより、多孔性
イオン化台7のクリーニングを行い、コンタミをなく
し、安定したCFF LC/MSの測定を行う。また、
試料の極性が無極性から低極性の物質のイオン化はCF
Fによるイオン化が困難のため、不活性ガス注入系12
より“N2 ”“He”等のガスを流したヒータ13で温
度を上げながら試料,移動相を吹き付け、多孔性イオン
化台7に到達する前に試料を気化させ、イオン化台を出
た後は近傍に設置されたフィラメント15から生成され
た電子ビーム14により気化した試料は電子衝撃イオン
化を受け、高感度のEIイオンとして分析される。
The sample, the mobile phase and the matrix separated and discharged from the liquid chromatogram 9 are separated by the splitter 16
It is split by and it partly oozes out to the porous ionization stand of the ionization chamber installed in the ion source. The sample ion beam 8 is sent to the mass spectrometer for analysis by being irradiated with ions of xenon, argon, etc. generated from the primary ion beam generator on the porous ionization table. In CFF ionization such as this device, various matrices, samples, impurities in the samples, etc. accumulate on the porous ionization table to increase the background.
The device becomes unstable and stable measurement for a long time is impossible. Although the sample flowing out from the liquid chromatogram has a wide range from nonpolar to high polarity, ionization such as CFF is relatively easy to ionize highly polar substances, but nonpolar to low polar substances are hardly ionized. The function as LC / MS could not be fully fulfilled. In this patent, for cleaning the porous ionization table 7, a solvent that dissolves the matrix, the contaminant substances of the sample, and the like is made to flow from the cleaning solvent 11, and the temperature of the solvent is raised by the heater 13 installed in the middle of the flow path to increase the solubility of the sample and the like. By raising the temperature, the porous ionization table 7 is cleaned, contamination is eliminated, and stable CFF LC / MS measurement is performed. Also,
Ionization of substances with non-polar to low-polarity samples is CF
Inert gas injection system 12 because ionization by F is difficult
Further, the sample and the mobile phase are sprayed while the temperature is raised by the heater 13 in which a gas such as “N 2 ” or “He” is flown, the sample is vaporized before reaching the porous ionization table 7, and after leaving the ionization table. The sample vaporized by the electron beam 14 generated from the filament 15 installed in the vicinity undergoes electron impact ionization and is analyzed as high-sensitivity EI ion.

【0008】[0008]

【発明の効果】本発明により、CFFのバックグラウン
ドを低減させ、かつ暗定量分析した測定が可能となり、
また液体クロマトグラムより溶出される無極性から高極
性物質の分析が可能となった。
Industrial Applicability According to the present invention, it is possible to reduce the background of CFF and perform dark quantitative analysis.
In addition, it has become possible to analyze non-polar to highly polar substances eluted from liquid chromatograms.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1…質量分析系、2…イオン源、3…イオン化室、4…
レンズ電極群、5…一次イオンビーム発生器、6…一次
イオンビーム、7…多孔性イオン化台、8…試料イオン
ビーム、9…液体クロマトグラム、10…流路調整弁、
11…多孔性イオン化台クリーニング溶媒、12…不活
性ガス、13…ヒータ、14…電子ビーム、15…フィ
ラメント、16…スプリッター、17…スプリッター流
量計。
1 ... Mass spectrometry system, 2 ... Ion source, 3 ... Ionization chamber, 4 ...
Lens electrode group, 5 ... Primary ion beam generator, 6 ... Primary ion beam, 7 ... Porous ionization table, 8 ... Sample ion beam, 9 ... Liquid chromatogram, 10 ... Flow path adjusting valve,
11 ... Porous ionization table cleaning solvent, 12 ... Inert gas, 13 ... Heater, 14 ... Electron beam, 15 ... Filament, 16 ... Splitter, 17 ... Splitter flow meter.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 利明 茨城県勝田市堀口字長久保832番地2 日 立計測エンジニアリング株式会社内 (72)発明者 板東 智美 茨城県勝田市堀口字長久保832番地2 日 立計測エンジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toshiaki Takahashi Toshiaki Takahashi 832 Nagakubo, Horiguchi, Katsuta-shi, Ibaraki 2 Nissei Measurement Engineering Co., Ltd. Measurement Engineering Co., Ltd.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】フリットファブLC/MSイオン源におい
て、移動相溶媒経路または直接多孔材部に、試料等によ
るコンタミを洗い流すための溶媒を流すことを特徴とし
た質量分析計用イオン源。
1. An ion source for a mass spectrometer, characterized in that, in a frit Fab LC / MS ion source, a solvent for washing out contaminants such as a sample is flowed through a mobile phase solvent path or directly into a porous material portion.
【請求項2】請求項1において、溶媒の流路にヒータを
設置し、溶媒の温度を昇温できるようにし、試料等によ
るコンタミを溶解し易くしたことを特徴とする質量分析
計用イオン源。
2. The ion source for a mass spectrometer according to claim 1, wherein a heater is installed in a solvent flow path so that a temperature of the solvent can be raised to easily dissolve a contaminant such as a sample. .
【請求項3】請求項2において、試料等を溶かす溶媒の
代わりに温度の上がった“N2 ”“He”ガス等を流
し、LCより流出してきた試料を気化させることを特徴
とした質量分析計用イオン源。
3. The mass spectrometry according to claim 2, wherein "N 2 ""He" gas or the like whose temperature has risen is caused to flow in place of the solvent for dissolving the sample and the sample flowing out from the LC is vaporized. Ion source for measurement.
【請求項4】請求項3において、多孔材部近傍にフィラ
メント等を設置し、それから生成される電子線等により
気化した試料をイオン化することを特徴とした質量分析
計用イオン源。
4. An ion source for a mass spectrometer according to claim 3, wherein a filament or the like is installed in the vicinity of the porous material portion, and the vaporized sample is ionized by an electron beam or the like generated therefrom.
JP5007341A 1993-01-20 1993-01-20 Ion source for mass spectrometer Pending JPH06213870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5007341A JPH06213870A (en) 1993-01-20 1993-01-20 Ion source for mass spectrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5007341A JPH06213870A (en) 1993-01-20 1993-01-20 Ion source for mass spectrometer

Publications (1)

Publication Number Publication Date
JPH06213870A true JPH06213870A (en) 1994-08-05

Family

ID=11663244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5007341A Pending JPH06213870A (en) 1993-01-20 1993-01-20 Ion source for mass spectrometer

Country Status (1)

Country Link
JP (1) JPH06213870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006507509A (en) * 2002-10-29 2006-03-02 ターゲット・ディスカバリー・インコーポレイテッド Method for increasing ionization efficiency of mass spectrometry

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006507509A (en) * 2002-10-29 2006-03-02 ターゲット・ディスカバリー・インコーポレイテッド Method for increasing ionization efficiency of mass spectrometry
US7939797B2 (en) 2002-10-29 2011-05-10 Target Discovery Increasing ionization efficiency in mass spectroscopy
JP4754831B2 (en) * 2002-10-29 2011-08-24 ターゲット・ディスカバリー・インコーポレイテッド Method for increasing ionization efficiency of mass spectrometry

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