JPH0814569B2 - Ion concentration analyzer - Google Patents

Ion concentration analyzer

Info

Publication number
JPH0814569B2
JPH0814569B2 JP63111606A JP11160688A JPH0814569B2 JP H0814569 B2 JPH0814569 B2 JP H0814569B2 JP 63111606 A JP63111606 A JP 63111606A JP 11160688 A JP11160688 A JP 11160688A JP H0814569 B2 JPH0814569 B2 JP H0814569B2
Authority
JP
Japan
Prior art keywords
concentration
calibration
ion concentration
solution
low
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.)
Expired - Lifetime
Application number
JP63111606A
Other languages
Japanese (ja)
Other versions
JPH01282459A (en
Inventor
征治 山口
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP63111606A priority Critical patent/JPH0814569B2/en
Publication of JPH01282459A publication Critical patent/JPH01282459A/en
Publication of JPH0814569B2 publication Critical patent/JPH0814569B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Description

【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） この発明は、イオン選択性電極（以下、イオン電極と
称する）を用いて溶液中の特定イオンの濃度を分析する
イオン濃度分析装置の改良に関し、解くに広範囲のイオ
ン濃度を精度良く分析するためのイオン濃度分析装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) This invention relates to an ion concentration for analyzing the concentration of a specific ion in a solution using an ion selective electrode (hereinafter referred to as an ion electrode). The present invention relates to an improved analyzer, and an ion concentration analyzer for analyzing a wide range of ion concentrations with high accuracy.

（従来の技術） 溶液中の特定イオン濃度、例えばNa+,K+.Ca2+,Cl-な
どの濃度を分析するイオン濃度分析装置して、イオン電
極を用いたものがある。(Prior Art) There is an ion concentration analyzer using an ion electrode as an ion concentration analyzer for analyzing the concentration of a specific ion in a solution, for example, the concentration of Na + , K + .Ca 2+ , Cl − .

このようなイオン濃度分析装置の構成例が第３図に示
されている。このイオン濃度分析装置はフローセル形の
ものであり、イオン電極１、比較電極２がフローセル３
に気密的に取付けられている。An example of the configuration of such an ion concentration analyzer is shown in FIG. This ion concentration analyzer is of the flow cell type, and the ion electrode 1 and the reference electrode 2 are the flow cell 3
Is installed airtightly.

また、校正液又は試料液をフローセル３に送り込むた
めのポンプ４、試料液５を送るか校正液６又は７を送る
かを切り替えるための三方口電磁弁８、低濃度校正液６
を送るか高濃度校正液７を送るかを切り替えるための三
方口電磁弁９が備えられている。さらに、測定後の液を
貯留するための排液タンク10も設けられている。Further, a pump 4 for sending the calibration liquid or the sample liquid to the flow cell 3, a three-way solenoid valve 8 for switching between sending the sample liquid 5 and the calibration liquid 6 or 7, a low concentration calibration liquid 6
There is provided a three-way solenoid valve 9 for switching between sending the high-concentration calibration liquid 7 and the high-concentration calibration liquid 7. Further, a drainage tank 10 for storing the measured liquid is also provided.

そして、上記各構成部分３〜10の間はプラスチック製
の配管11で接続されている。A plastic pipe 11 is connected between the constituent parts 3 to 10.

一方、電気的には、イオン電極１、比較電極２の出力
が電位差計12に接続され、さらに電位差計12の出力が演
算器13に接続されている。On the other hand, electrically, the outputs of the ion electrode 1 and the comparison electrode 2 are connected to the potentiometer 12, and the output of the potentiometer 12 is further connected to the calculator 13.

次に、上記構成のイオン濃度分析装置の動作を説明す
る。まず、三方口電磁弁８を校正液５側に、三方口電磁
弁９を低濃度校正液６側に切替えておき、低濃度校正液
６をポンプ４により吸引してフローセル３に送り込む。
そして、この時の比較電極２に対するイオン電極１の電
位（以下、電極電位と称する）E1を電位差計12によって
測定し、演算器13の中のメモリに記憶させる。Next, the operation of the ion concentration analyzer having the above structure will be described. First, the three-way solenoid valve 8 is switched to the calibration liquid 5 side and the three-way solenoid valve 9 is switched to the low concentration calibration liquid 6 side, and the low concentration calibration liquid 6 is sucked by the pump 4 and sent to the flow cell 3.
Then, the potential (hereinafter, referred to as an electrode potential) E 1 of the ion electrode 1 with respect to the reference electrode 2 at this time is measured by the potentiometer 12 and stored in the memory in the calculator 13.

次に三方口電磁弁９を高濃度校正液７側に切替えて、
前記と同様に電極電位E2を電位差計12により測定し、演
算器13の中のメモリに記憶させる。Next, switch the 3-way solenoid valve 9 to the high-concentration calibration liquid 7 side,
Similarly to the above, the electrode potential E 2 is measured by the potentiometer 12 and stored in the memory in the calculator 13.

この後、演算器13は、予め設定されている低濃度校正
液６及び高濃度校正液７のイオン濃度をそれぞれC1,C2
とすると、上記の校正液に対する電極電位E1,E2から第
４図に示すような検量線14を求め、この検量線14の式を
メモリに記憶する。Thereafter, the calculator 13 sets the preset ion concentrations of the low concentration calibration liquid 6 and the high concentration calibration liquid 7 to C 1 and C 2 respectively.
Then, a calibration curve 14 as shown in FIG. 4 is obtained from the electrode potentials E 1 and E 2 with respect to the above calibration liquid, and the formula of this calibration curve 14 is stored in the memory.

次に、三方口電磁弁８を試料液５側に切替えて、前記
と同様に電極電位Ｅを測定し、演算器13において、この
試料液５に対する電極電位Ｅの値を前記検量線14の式に
あてはめて試料液５のイオン濃度Ｃを計算し、出力す
る。Next, the three-way solenoid valve 8 is switched to the sample liquid 5 side, the electrode potential E is measured in the same manner as above, and the value of the electrode potential E for this sample liquid 5 is calculated by the calculator 13 using the formula of the calibration curve 14 described above. Then, the ion concentration C of the sample solution 5 is calculated and output.

（発明が解決しようとする課題） しかしながら、このようなイオン濃度分析装置におい
ては、次のような問題点が考えられる。つまり、イオン
電極１の特性上、すべての濃度範囲に渡って１つの直線
的な検量線では満足できないということである。例え
ば、第２図に示すように、濃度Caから濃度Cbまでの間は
直線ABであるが、濃度Caより低い濃度Cfから濃度Caまで
は直線FA、また濃度Cbからそれよりも高い濃度Cg間では
直線BGのようになることである。(Problems to be Solved by the Invention) However, the following problems are conceivable in such an ion concentration analyzer. In other words, due to the characteristics of the ion electrode 1, one linear calibration curve cannot be satisfied over the entire concentration range. For example, as shown in FIG. 2, there is a straight line AB between the concentration Ca and the concentration Cb, but a straight line FA between the concentration Cf and the concentration Ca lower than the concentration Ca, and between the concentration Cb and the higher concentration Cg. Then it becomes like a straight line BG.

このような特性があっても、これまでのところは、主
たる測定範囲を濃度Caから濃度Cbの間として濃度Ca,Cb
の校正液6,7を用いて検量線ABを求めて分析を行ない、
濃度Ca以下又は濃度Cb以上についても直線ABを外挿した
直線AF′又は直線BG′によって分析を行なうようにして
いる。そのため、第２図に示すようにΔCf又はΔCgの分
析誤差を生ずるという問題点がある。Even with such characteristics, the main measurement range has so far been set between the concentrations Ca and Cb as the main measurement range.
Using the calibration liquids 6 and 7 of, the calibration curve AB is obtained and analyzed,
For concentrations below Ca or above Cb, analysis is performed by a straight line AF 'or a straight line BG' extrapolated from the straight line AB. Therefore, there is a problem that an analysis error of ΔCf or ΔCg occurs as shown in FIG.

そこで、このような場合、一般的な分析計において
は、リニアライズ回路を用いて測定信号と濃度との関係
を１つの直線関係に変換する手法が用いられる。Therefore, in such a case, in a general analyzer, a method of converting the relationship between the measurement signal and the concentration into one linear relationship using a linearizing circuit is used.

しかしながら、イオン電極においては、濃度と電極電
位との関係は長時間に渡って一定でないため、試料液の
濃度測定の前に校正液を測定して検量線を求め、それに
よって試料液の濃度を分析する手法がとられる。However, in the ion electrode, the relationship between the concentration and the electrode potential is not constant over a long period of time, so the calibration solution is measured before measuring the concentration of the sample solution to obtain the calibration curve, and the concentration of the sample solution is determined by the calibration curve. The method of analysis is taken.

したがって、前記のようなリニアライズ特性が固定し
ているリニアライズ回路を用いることはできず、低濃度
領域や高濃度領域ではΔCf,ΔCgの誤差に甘んじてい
た。Therefore, the linearization circuit having the fixed linearization characteristics as described above cannot be used, and the error of ΔCf and ΔCg is taken into consideration in the low concentration region and the high concentration region.

この発明は、このような従来の問題点に鑑みてなされ
たもので、主たる測定範囲以外の濃度についても、前記
のような誤差要因をなくして精度良く分析できるイオン
濃度分析装置を提供することを目的とする。The present invention has been made in view of the above conventional problems, and provides an ion concentration analyzer that can accurately analyze concentrations other than the main measurement range without the above error factors. To aim.

［発明の構成］ （課題を解決するための手段） この発明のイオン濃度分析装置は、予め定められた高
イオン濃度、低イオン濃度、高々イオン濃度、低々イオ
ン濃度それぞれの校正液、及び試料液を切替えてフロー
セルに供給する溶液供給手段と、 フローセルに送られてきた溶液に対して比較電極とイ
オン選択性電極との間の電位差（以下、電極電位と称す
る）を検出する電位差計と、 高低イオン濃度の異なる校正液に対する電極電位から
検量線を求め、試料液に対する電極電位を前記検量線に
照らし合せて試料液のイオン濃度を算出する演算器と、 通常時には前記高イオン濃度校正液と低イオン濃度校
正液とをそれぞれ前記フローセルに供給させて前記演算
器により主測定範囲の検量線を求めさせ、前記試料液の
電極電位が前記高イオン濃度校正液の電極電位より高い
時又は前記低イオン濃度校正液の電極電位より低い時そ
れぞれの場合には、前記高々イオン濃度校正液又は低々
イオン濃度校正液を前記フローセルに供給させて前記演
算器にて高濃度−高々濃度間又は低濃度−低々濃度間の
検量線を求めさせ、試料液の検量線とするコントローラ
とを備えたものである。[Structure of the Invention] (Means for Solving the Problem) The ion concentration analyzer of the present invention comprises a predetermined high ion concentration, low ion concentration, high ion concentration, low ion concentration calibration liquid, and sample. A solution supply means for switching the liquid and supplying the solution to the flow cell, and a potentiometer for detecting a potential difference (hereinafter, referred to as an electrode potential) between the comparison electrode and the ion selective electrode with respect to the solution sent to the flow cell, A calibration curve is calculated from the electrode potentials for the calibration solutions with different high and low ion concentrations, and the calculator for comparing the electrode potentials for the sample solution with the calibration curve to calculate the ion concentration of the sample solution; A low ionic concentration calibration solution and a flow cell are respectively supplied to the flow cell, and a calibration curve of the main measurement range is obtained by the calculator, and the electrode potential of the sample solution is the high ion. When it is higher than the electrode potential of the calibration solution or lower than the electrode potential of the low ion concentration calibration solution, respectively, the high ion concentration calibration solution or the low ion concentration calibration solution is supplied to the flow cell to perform the calculation. And a controller for obtaining a calibration curve between the high concentration and the high and low concentrations or the low concentration and the low and low concentrations by the instrument and using the calibration curve for the sample solution.

（作用） この発明のイオン濃度分析装置では、低イオン濃度C
a、高イオン濃度Cbの校正液を用いて主測定範囲の検量
線ABを求め、次に試料液の測定を行なう。そして、電極
電位Ｅが校正液濃度Ca,Cbに対応する電極電位Ea,Ebの間
にある時には検量線ABにより濃度を求める。(Operation) In the ion concentration analyzer of the present invention, the low ion concentration C
a, Using a calibration solution with a high ion concentration Cb, obtain a calibration curve AB in the main measurement range, and then measure the sample solution. Then, when the electrode potential E is between the electrode potentials Ea and Eb corresponding to the calibration liquid concentrations Ca and Cb, the concentration is obtained from the calibration curve AB.

一方、電極電位ＥがEaよりも小さい時、又はEbよりも
大きい時には、さらに低々濃度Cf又は高々濃度Cgの校正
液の電極電位を測定して低濃度領域の検量線FA又は高濃
度領域の検量線BGを求め、これによって試料液の濃度を
求める。On the other hand, when the electrode potential E is smaller than Ea or larger than Eb, the electrode potential of the calibration liquid having a low-concentration Cf or a high-concentration Cg is measured to measure the calibration curve FA in the low-concentration region or the high-concentration region. Obtain the calibration curve BG, and then determine the concentration of the sample solution.

（実施例） 以下、この発明の実施例を図に基づいて詳説する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

第１図はこの発明の一実施例を示しており、低濃度Ca
の校正液15、高濃度Cbの校正液16は配管を通して四方口
電磁弁17に接続され、この四方口電磁弁17は三方口電磁
弁８に接続されている。FIG. 1 shows an embodiment of the present invention, in which low concentration Ca
The calibration liquid 15 and the calibration liquid 16 of high concentration Cb are connected to the four-way solenoid valve 17 through a pipe, and the four-way solenoid valve 17 is connected to the three-way solenoid valve 8.

18,19はそれぞれ第３図における低濃度Caよりも低い
低々濃度Cf、高濃度Cbよりも高い高々濃度Cgの校正液で
あり、これらは配管を通して三方口電磁弁20に接続さ
れ、この三方口電磁弁20は配管21により四方口電磁弁17
に接続されている。Reference numerals 18 and 19 are calibration liquids having a low concentration Cf lower than the low concentration Ca and a high concentration Cg higher than the high concentration Cb in Fig. 3, respectively, and these are connected to the three-way solenoid valve 20 through a pipe. The port solenoid valve 20 is a four-way port solenoid valve 17
It is connected to the.

コントローラ22は、電位差計12からの信号を受けてポ
ンプ４及び電磁弁8,17,20をシーケンス的に動作させる
ためのものである。The controller 22 receives the signal from the potentiometer 12 and operates the pump 4 and the solenoid valves 8, 17, 20 in sequence.

尚、その他の部分については、第４図の従来例と同一
の符号を付して示した部分は従来例と同様の構成を備え
ており、同一の符号を用いることにより詳しい構成の説
明を省略する。As for the other portions, the portions denoted by the same reference numerals as those of the conventional example in FIG. 4 have the same configuration as the conventional example, and the detailed description of the configuration is omitted by using the same reference numerals. To do.

上記の構成のイオン濃度分析装置の動作について、次
に説明する。The operation of the ion concentration analyzer having the above structure will be described below.

まず、三方口電磁弁８を校正液側にし、四方口電磁弁
17を低濃度校正液15側に切替えておき、低濃度Caの校正
液15をポンプ４により吸引してフローセル３に送り、こ
の時の比較電極２に対するイオン電極１の電位Eaを電位
差計12によって測定し、演算器13の中のメモリに記憶さ
せる。First, set the three-way solenoid valve 8 to the calibration liquid side, and set the four-way solenoid valve
17 is switched to the low concentration calibration solution 15 side, the calibration solution 15 of low concentration Ca is sucked by the pump 4 and sent to the flow cell 3, and the potential Ea of the ion electrode 1 with respect to the reference electrode 2 at this time is measured by the potentiometer 12. It is measured and stored in the memory in the calculator 13.

次に、四方口電磁弁17を高濃度校正液16側に切替え
て、前記と同様に高濃度Cbに対応する電極電位Ebを電位
差計12によって測定し、演算器13のメモリに記憶させ
る。Then, the four-way solenoid valve 17 is switched to the high-concentration calibration liquid 16 side, the electrode potential Eb corresponding to the high-concentration Cb is measured by the potentiometer 12 and stored in the memory of the calculator 13 as described above.

演算器13は、以上より主測定範囲の濃度Ca,Cb間の検
量線ABを求め、この検量線ABの式をメモリに記憶する。The calculator 13 obtains the calibration curve AB between the concentrations Ca and Cb in the main measurement range from the above, and stores the formula of this calibration curve AB in the memory.

次に、第２図に示すように、コントローラ22が三方口
電磁弁８を試料液５側に切替えて前記と同様に電極電位
Ｅを測定し、ＥがEaとEbとの間にある時は演算器13にお
いてこのＥの値を前記検量線ABの式にあてはめ、試料液
５のイオン濃度Ｃを計算して出力する。Then, as shown in FIG. 2, the controller 22 switches the three-way solenoid valve 8 to the sample liquid 5 side to measure the electrode potential E in the same manner as above, and when E is between Ea and Eb, The value of E is applied to the equation of the calibration curve AB in the calculator 13 to calculate and output the ion concentration C of the sample solution 5.

しかしながら、試料液５に対する電極電位ＥがEaより
も小さい時には、コントローラ22は四方口電磁弁17を配
管21側に切替えると共に、三方口電磁弁20を低々濃度校
正液18側に切替え、前記と同様に低々濃度Cfに対応する
電極電位Efを測定し、低濃度領域の検量線FAを求める。
そして、この検量線FAの式に電極電位Ｅをあてはめ、試
料液５のイオン濃度Ｃを計算して出力する。However, when the electrode potential E for the sample solution 5 is smaller than Ea, the controller 22 switches the four-way solenoid valve 17 to the pipe 21 side and the three-way solenoid valve 20 to the low concentration calibration solution 18 side. Similarly, the electrode potential Ef corresponding to the low-low concentration Cf is measured to obtain the calibration curve FA in the low-concentration region.
Then, the electrode potential E is applied to the formula of this calibration curve FA to calculate and output the ion concentration C of the sample liquid 5.

逆に、試料液５に対する電極電位ＥがEbより大きい時
には、コントローラ22は四方口電磁弁17を配管21側に切
替えると共に、三方口電磁弁20を高々濃度校正液19側に
切替え、前記と同様に高々濃度Cgに対応する電極電位Eg
を測定し、高濃度領域の検量線BGを求める。そして、こ
の検量線BGの式に電極電位Ｅをあてはめて試料液５のイ
オン濃度Ｃを計算して出力する。On the contrary, when the electrode potential E for the sample solution 5 is larger than Eb, the controller 22 switches the four-way solenoid valve 17 to the pipe 21 side and the three-way solenoid valve 20 to the concentration calibration solution 19 side at most, and the same as above. Electrode potential Eg corresponding to concentration Cg at most
Is measured and the calibration curve BG in the high concentration region is obtained. Then, the electrode potential E is applied to the equation of this calibration curve BG to calculate and output the ion concentration C of the sample liquid 5.

このようにして、主測定範囲Ca≦Ｃ≦Cbの時には通常
の検量線ABを用いて試料液濃度を求め、少ない頻度で起
こる低々濃度又は高々濃度の試料液に対しては新たに検
量線FA又はBGを求めてその濃度測定を行なうことがで
き、広い濃度範囲での測定が実現できるのである。In this way, when the main measurement range Ca ≦ C ≦ Cb, the sample solution concentration is obtained using the normal calibration curve AB, and a new calibration curve is obtained for sample solutions of low or high concentrations that occur infrequently. It is possible to obtain FA or BG and measure its concentration, and it is possible to realize measurement in a wide concentration range.

［発明の効果］ 以上のようにこの発明によれば、主たる測定範囲以外
のイオン濃度についてもその都度適切なイオン濃度の校
正液を用いて精度良い分析を行なうことができ、しかも
通常は主測定範囲の高イオン濃度及び低イオン濃度の校
正液を用いて溶液のイオン濃度分析を行ない、主測定範
囲を超えるような高い濃度又は低い濃度の溶液の測定が
必要になった時にだけ低々イオン濃度又は高々イオン濃
度の校正液を用いて測定するので、分析に要する時間も
長くかかることがない。[Effects of the Invention] As described above, according to the present invention, an ion concentration outside the main measurement range can be accurately analyzed using a calibration solution having an appropriate ion concentration each time, and normally, the main measurement is usually performed. Ion concentration analysis is performed using a calibration solution with high and low ion concentrations in the range, and only when it is necessary to measure a high or low concentration solution that exceeds the main measurement range Alternatively, since the measurement is performed using the calibration solution having the highest ion concentration, the analysis time does not take long.

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

第１図はこの発明の一実施例の構成を示すブロック図、
第２図は上記実施例によるイオン濃度と電極電位の関係
を示す検量線のグラフ、第３図は従来例のブロック図、
第４図は従来例によるイオン濃度と電極電位との関係を
示す検量線のグラフである。 １……イオン選択性電極、２……比較電極 ３……フローセル、４……ポンプ ５……試料液、12……電位差計 13……演算器、15……低濃度校正液 16……高濃度校正液、18……低々濃度校正液 19……高々濃度校正液、22……コントローラFIG. 1 is a block diagram showing the configuration of an embodiment of the present invention,
FIG. 2 is a graph of a calibration curve showing the relationship between the ion concentration and the electrode potential according to the above embodiment, and FIG. 3 is a block diagram of a conventional example,
FIG. 4 is a graph of a calibration curve showing the relationship between the ion concentration and the electrode potential according to the conventional example. 1 …… ion selective electrode, 2 …… reference electrode 3 …… flow cell, 4 …… pump 5 …… sample solution, 12 …… potentiometer 13 …… calculator, 15 …… low concentration calibration solution 16 …… high Concentration calibration liquid, 18 …… Low concentration calibration liquid 19 …… High concentration calibration liquid, 22 …… Controller

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】予め定められた高イオン濃度、低イオン濃
度、高々イオン濃度、低々イオン濃度それぞれの校正
液、及び試料液を切替えてフローセルに供給する溶液供
給手段と、 フローセルに送られてきた溶液に対して比較電極とイオ
ン選択性電極との間の電位差（以下、電極電位と称す
る）を検出する電位差計と、 高低イオン濃度の異なる校正液に対する電極電位から検
量線を求め、試料液に対する電極電位を前記検量線に照
らし合せて試料液のイオン濃度を算出する演算器と、 通常時には前記高イオン濃度校正液と低イオン濃度校正
液とをそれぞれ前記フローセルに供給させて前記演算器
により主測定範囲の検量線を求めさせ、前記試料液の電
極電位が前記高イオン濃度校正液の電極電位より高い時
又は前記低イオン濃度校正液の電極電位より低い時それ
ぞれの場合には、前記高々イオン濃度校正液又は低々イ
オン濃度校正液を前記フローセルに供給させて前記演算
器にて高濃度−高々濃度間又は低濃度−低々濃度間の検
量線を求めさせ、試料液の検量線とするコントローラと
を備えて成るイオン濃度分析装置。1. A solution supplying means for switching a predetermined high ion concentration, low ion concentration, high ion concentration, low ion concentration, and calibration liquid, and a sample liquid to a flow cell, and a solution supply means for sending the solution to the flow cell. A potentiometer that detects the potential difference (hereinafter referred to as the electrode potential) between the reference electrode and the ion-selective electrode for the prepared solution, and the calibration curve is obtained from the electrode potentials for the calibration solutions with different high and low ion concentrations. A calculator for calculating the ion concentration of the sample solution by comparing the electrode potential with respect to the calibration curve, and in normal times, the high ion concentration calibration solution and the low ion concentration calibration solution are respectively supplied to the flow cell and The calibration curve of the main measurement range is determined, and when the electrode potential of the sample solution is higher than the electrode potential of the high ion concentration calibration solution or the electrode potential of the low ion concentration calibration solution is determined. In each case at lower times, the high-high ion concentration calibration liquid or the low-low ion concentration calibration liquid is supplied to the flow cell, and the arithmetic unit calibrates between high concentration-high concentration or low concentration-low concentration. An ion concentration analyzer comprising a controller for determining a curve and using it as a calibration curve for a sample solution.
JP63111606A 1988-05-10 1988-05-10 Ion concentration analyzer Expired - Lifetime JPH0814569B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63111606A JPH0814569B2 (en) 1988-05-10 1988-05-10 Ion concentration analyzer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63111606A JPH0814569B2 (en) 1988-05-10 1988-05-10 Ion concentration analyzer

Publications (2)

Publication Number Publication Date
JPH01282459A JPH01282459A (en) 1989-11-14
JPH0814569B2 true JPH0814569B2 (en) 1996-02-14

Family

ID=14565605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63111606A Expired - Lifetime JPH0814569B2 (en) 1988-05-10 1988-05-10 Ion concentration analyzer

Country Status (1)

Country Link
JP (1) JPH0814569B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4040158A4 (en) * 2019-07-22 2023-12-06 Hitachi High-Tech Corporation AUTOMATIC ANALYSIS DEVICE AND METHOD FOR AUTOMATIC ANALYSIS OF SAMPLES

Also Published As

Publication number Publication date
JPH01282459A (en) 1989-11-14

Similar Documents

Publication Publication Date Title
US10018585B2 (en) Electrolyte concentration measuring apparatus and measuring method using same
JP6622665B2 (en) Electrolyte concentration measuring device
KR950019728A (en) Ion concentration measuring device and ion concentration measuring method
EP2034311A1 (en) Gasless calibration in metabolic gas analyzers
EP0218469A2 (en) On-line calibration system for chemical monitors
CN113552529B (en) A self-calibration system and method based on online monitoring of smart electric energy meters
Lindner et al. Switched wall jet for dynamic response measurements
US20210033558A1 (en) Method for correcting two measured values from different analytical measuring devices and measuring point for carrying out the method
EP0517339A1 (en) Method of determining, with the aid of an ion-selective electrode, the concentration of a substance to be determined, and apparatus to be used in said method
US5872454A (en) Calibration procedure that improves accuracy of electrolytic conductivity measurement systems
EP4481374A1 (en) Electrolyte concentration measuring device and method for obtaining selectivity coefficient
Adams et al. Electrochemical pH-stat and controlled current coulometric acid-base analyzer
US3357908A (en) Electrolytic sensor with water diffusion compensation
WO2008073002A1 (en) Method for determining the activity of sodium ions and a device for carrying out said method
US4600494A (en) Ion analyzer calibration cell
CN111788479A (en) Automatic analysis device, automatic analysis method
US4440619A (en) Electro-analytical measuring equipment with measuring cell, comprising integral sensing element and several reference electrodes
DK2329697T3 (en) Modulation of polarization voltage of amperometric sensors
JPS62294959A (en) Measurement of ion activity
JPH01282459A (en) Ion concentration analyzer
JP3563399B2 (en) Gas analyzer
JP2001108652A (en) Residual chlorine concentration measurement device
JPH05322843A (en) Electrolyte analyzer using ion electrode
JPH04191650A (en) Ion measuring device
JPH0513574B2 (en)