JPS60194351A - Flow-through electrode cell - Google Patents

Flow-through electrode cell

Info

Publication number
JPS60194351A
JPS60194351A JP4901884A JP4901884A JPS60194351A JP S60194351 A JPS60194351 A JP S60194351A JP 4901884 A JP4901884 A JP 4901884A JP 4901884 A JP4901884 A JP 4901884A JP S60194351 A JPS60194351 A JP S60194351A
Authority
JP
Japan
Prior art keywords
electrode
potential
flow
electrode cell
specimen
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
JP4901884A
Other languages
Japanese (ja)
Inventor
Hiroko Takehara
竹原　裕子
Yoko Ozaki
尾崎　葉子
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 Ltd
Original Assignee
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 Ltd filed Critical Hitachi Ltd
Priority to JP4901884A priority Critical patent/JPS60194351A/en
Publication of JPS60194351A publication Critical patent/JPS60194351A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/62—Detectors specially adapted therefor
    • G01N30/64—Electrical detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/4035—Combination of a single ion-sensing electrode and a single reference electrode
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
    • G01N35/085—Flow Injection Analysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

PURPOSE:To prevent the generation of potential noise or shift, by arranging an ion electrode and a comparison electrode to the same position of a specimen flowline system and making a drain hole thicker than a connection part or an inflow hole and draining drain water horizontally or downwardly. CONSTITUTION:The specimen flowline system of a flow-through electrode cell 2 for a flow injection analyzer or a liquid chromatograph detector is constituted of an inflow hole 4 having a Teflon tube with an inner diameter of 0.5mm. connected thereto and a drain hole 5 having a Teflon tube with an inner diameter of 2mm. connected thereto in a downwardly directed state and a composite electrode 1 consisting of an ion selection electrode and a comparison electrode is set to the electrode cell 2. A liquid specimen is sent into the electrode cell 2 by a plunger pump to perform the measurement of potential.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はフローインジェクション分析および液体クロマ
トグラフ検゛出器用フロースルー電極セルに係り、特に
流動電位に基づく電位ノイズの解消に好適な７０−スル
ー電極セルに関する。Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to a flow-through electrode cell for flow injection analysis and liquid chromatography detectors, and in particular to a 70-through electrode cell suitable for eliminating potential noise based on flowing potential. Regarding cells.

〔発明の背景〕[Background of the invention]

従来のフロースルー電極セルは、イオン選択性電極と比
較電極が流路系の離れた位置に設置され、その間が細管
で繋がっており、出口配管太さについても何ら考慮が払
われず、入口側と同程度の細管が使用されていたので、
特に電気抵抗の大きい試料の測定において、流動電位に
基づく電位ノイズや電位シフトを生ずるという欠漬があ
った。これに対して一部では、試料液に高濃度の電解質
溶液を添加して導電率を上げ、かつ配管系をアースして
電位ノイズを無くす方法がとられているが、新たなポン
プの使用など系が複雑になるという欠漬があった。In conventional flow-through electrode cells, the ion-selective electrode and the reference electrode are installed at separate locations in the flow path system, and they are connected by a thin tube, and no consideration is given to the thickness of the outlet piping, and the inlet and Since similar tubules were used,
Particularly in the measurement of samples with high electrical resistance, potential noise and potential shifts based on the flowing potential occur. In response to this, some methods have been taken to increase the conductivity by adding a highly concentrated electrolyte solution to the sample solution and grounding the piping system to eliminate potential noise. There was a drawback that the system became complicated.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、流動電位に起因する電位ノイズおよび
電位シフトを生じないフロースルー電極セルを提供する
ことにある。An object of the present invention is to provide a flow-through electrode cell that does not generate potential noise and potential shifts caused by flowing potentials.

〔発明の概要〕[Summary of the invention]

イオン選択性電極と比較電極間の配管内で生ずる流動電
位が電位ノイズおよび電位シフトの主原因であることか
ら、試料流路系の同位置にイオン選択性電極及び比較電
極を設置する。複合電極を使用するのも同じ理由に基づ
く。また上記条件を満足した場合でも、セル出口及びそ
の後の配管が細い場合は電位ノイズを生じ易いことから
、出口を太くし、かつ排出液を水平もしくは下方に流す
。Since the flowing potential generated in the piping between the ion-selective electrode and the comparison electrode is the main cause of potential noise and potential shift, the ion-selective electrode and the comparison electrode are installed at the same position in the sample flow path system. The use of composite electrodes is based on the same reason. Furthermore, even if the above conditions are satisfied, potential noise is likely to occur if the cell outlet and subsequent piping are thin, so the outlet is made thicker and the drained liquid is made to flow horizontally or downwardly.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を図により説明する。。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings. .

Ｆ複合電極１を電極セル２にセットする。０リング３を
用いて試料液のシールを行う。流入孔４に内径０．０５
ｍのテフロンチューブを接続し、プランジャーポンプを
用いて試料液を送り込む。F Composite electrode 1 is set in electrode cell 2. Seal the sample liquid using O-ring 3. Inner diameter of inflow hole 4 is 0.05
Connect the Teflon tube (m) and send the sample solution using a plunger pump.

排出孔５に内径２１ｗＩのテフロンチューブを下方に向
けて接続し、排出液を廃棄する。本実施例を用いて１０
０μ２ｈの弗素イオン溶液を毎分２−の流速で送って電
位測定を行った場合電位ノイズは１ｍＶ以下となった。A Teflon tube with an inner diameter of 21 wI is connected to the drain hole 5 facing downward, and the drained liquid is discarded. Using this example, 10
When the potential was measured by sending 0 μ2 h of fluorine ion solution at a flow rate of 2 −/min, the potential noise was less than 1 mV.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、電解質溶液添加のための新たなポンプ
の設置等を必要とせず、イオン強度１０−ｓ〜１０−６
オーダーの低濃度試料まで電位ノイ１ｍＶ以下で電位測
定が可能となる。According to the present invention, it is not necessary to install a new pump for adding electrolyte solution, and the ionic strength is 10-s to 10-6.
Potential measurement is possible with a potential noise of 1 mV or less, even for samples with low concentrations on the order of magnitude.

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

図は本発明の一実施例を示す断面図である。 １・・・弗素イオン複合電極、 ２・・・電極セル、 ３・・・０リング、 ４・・・流入孔、 ５・・・排出孔。 The figure is a sectional view showing one embodiment of the present invention. 1...Fluoride ion composite electrode, 2...electrode cell, 3...0 ring, 4...Inflow hole, 5...Discharge hole.

Claims (1)

【特許請求の範囲】[Claims] ｔ　連続にイオン電極電位を測定するための電極セルに
おいて、イオン電極および比較電極を流路系の同一位置
であって、途中に細管を介す゛ることなく、設置しもし
くは複合電極を設置するための接続部、流（入孔よりも
太く、排出水を水平もしくは下方に排出するための排水
孔および排管を設けたことを特徴とする７０−スルー電
極セル。t In an electrode cell for continuously measuring the ion electrode potential, the ion electrode and the reference electrode are installed at the same position in the flow path system without passing a thin tube in the middle, or a combination electrode is installed. A 70-through electrode cell characterized by having a connection part, a drain hole (thicker than the inlet hole, and a drain pipe for discharging wastewater horizontally or downwardly).
JP4901884A 1984-03-16 1984-03-16 Flow-through electrode cell Pending JPS60194351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4901884A JPS60194351A (en) 1984-03-16 1984-03-16 Flow-through electrode cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4901884A JPS60194351A (en) 1984-03-16 1984-03-16 Flow-through electrode cell

Publications (1)

Publication Number Publication Date
JPS60194351A true JPS60194351A (en) 1985-10-02

Family

ID=12819384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4901884A Pending JPS60194351A (en) 1984-03-16 1984-03-16 Flow-through electrode cell

Country Status (1)

Country Link
JP (1) JPS60194351A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05338080A (en) * 1992-06-05 1993-12-21 Achilles Corp Production of rubberized fabric
CN104359960A (en) * 2014-11-17 2015-02-18 中国科学院长春应用化学研究所 Affinity-based open type electrochemical flow detection bath

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05338080A (en) * 1992-06-05 1993-12-21 Achilles Corp Production of rubberized fabric
CN104359960A (en) * 2014-11-17 2015-02-18 中国科学院长春应用化学研究所 Affinity-based open type electrochemical flow detection bath

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