JP2800754B2 - Method for analyzing ions in liquid crystals - Google Patents
Method for analyzing ions in liquid crystalsInfo
- Publication number
- JP2800754B2 JP2800754B2 JP8021824A JP2182496A JP2800754B2 JP 2800754 B2 JP2800754 B2 JP 2800754B2 JP 8021824 A JP8021824 A JP 8021824A JP 2182496 A JP2182496 A JP 2182496A JP 2800754 B2 JP2800754 B2 JP 2800754B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- ions
- ion
- analysis
- analysis method
- 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 - Fee Related
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 42
- 150000002500 ions Chemical class 0.000 title claims description 37
- 238000000034 method Methods 0.000 title claims description 5
- 238000004458 analytical method Methods 0.000 claims description 21
- 239000007853 buffer solution Substances 0.000 claims description 4
- 238000005251 capillar electrophoresis Methods 0.000 claims description 4
- 238000002835 absorbance Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000872 buffer Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000011088 calibration curve Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はイオン分析法に関
し、特に液晶や有機溶媒中のイオン分析方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion analysis method, and more particularly, to a method for analyzing ions in a liquid crystal or an organic solvent.
【０００２】[0002]
【従来の技術】液晶中のイオンは、液晶デバイスの電気
光学特性に影響を与え、液晶パネル等の製品の信頼性や
歩留まりの低下を招くと考えられるため、液晶中のイオ
ンの定性及び定量分析データは、製品プロセス管理や不
良解析を行う上で、なくてはならないデータである。2. Description of the Related Art Ions in liquid crystals are thought to affect the electro-optical characteristics of liquid crystal devices and reduce the reliability and yield of products such as liquid crystal panels. The data is indispensable in performing product process management and failure analysis.
【０００３】従来の液晶中のイオン分析法においては、
液晶の灰化後の元素分析、水で逆抽出を行った後のイオ
ンクロマトグラフ法による分析や原子吸光法による分析
などが用いられている。In the conventional method for analyzing ions in a liquid crystal,
Elemental analysis after incineration of liquid crystal, analysis by ion chromatography after back extraction with water, and analysis by atomic absorption method are used.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、これら
の分析はいずれも液晶相での分析ではないことから、液
晶相で遊離しているイオンのみを検出しているわけでは
なく、液晶中の無機元素全体を検出している。However, since these analyzes are not analyzes in the liquid crystal phase, they do not only detect ions released in the liquid crystal phase, but do not detect inorganic elements in the liquid crystal. The whole has been detected.
【０００５】例えば、水での逆抽出を行うと、液晶中で
は塩の状態をとるものまでが抽出水の中に溶け込んでイ
オンとして検出されてしまい、このため、液晶中のイオ
ンの定性、定量分析データは全く正確さに欠けることに
なる。[0005] For example, when back extraction is performed with water, even those that take a salt state in the liquid crystal dissolve in the extracted water and are detected as ions. Therefore, the qualitative and quantitative determination of the ions in the liquid crystal is performed. The analytical data will be totally inaccurate.
【０００６】すなわち、従来の分析法では、試料系と分
析系でのイオン解離の平衡状態が異なるために、液晶中
で塩として存在する物質とイオンとを区別することなく
検出してしまう。このように従来の分析法では、液晶相
での状態を反映しないデータしか取得することができ
ず、このため、これを基にした解析結果は不正確なもの
となってしまう。That is, in the conventional analysis method, since the equilibrium state of ion dissociation between the sample system and the analysis system is different, detection is performed without distinguishing between ions and substances existing as salts in the liquid crystal. As described above, according to the conventional analysis method, only data that does not reflect the state in the liquid crystal phase can be acquired, and therefore, the analysis result based on the data becomes inaccurate.
【０００７】上記した通り、従来のイオン分析方法で
は、灰化や水での逆抽出などの前処理を行わなくてはな
らないから、液晶中の塩とイオンの区別ができなかっ
た。As described above, in the conventional ion analysis method, pretreatment such as incineration and back extraction with water has to be performed, so that salts and ions in the liquid crystal cannot be distinguished.
【０００８】従って、本発明は、上記問題点に鑑みて為
されたものであって、その目的は、試料系と分析系のイ
オン解離の平衡状態を同一にし、液晶中で塩として存在
する物質とイオンを分離して液晶中のイオンの正確な定
性及び定量を行う分析方法を提供することにある。[0008] Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to make the equilibrium state of ion dissociation between a sample system and an analysis system the same, and to provide a substance existing as a salt in a liquid crystal Another object of the present invention is to provide an analytical method for separating ions from ions in a liquid crystal to accurately and qualitatively and quantitatively determine the ions.
【０００９】[0009]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、キャピラリー電気泳動法におけるキャピ
ラリーカラム内のバッファー溶液に液晶を用い、液晶中
のイオンを分析することを特徴とするイオン分析方法を
提供する。According to the present invention, there is provided an ion analysis method comprising the steps of using a liquid crystal as a buffer solution in a capillary column in capillary electrophoresis and analyzing ions in the liquid crystal. I will provide a.
【００１０】本発明によれば、分析を行う試料の状態を
液晶相とするために、キャピラリー電気泳動法を用い、
キャピラリーカラム内のバッファーを液晶とすることに
より、塩やイオンの液晶中での存在状態を保持したまま
分析を行い、正確なイオンの定性及び定量を行うように
したものである。According to the present invention, capillary electrophoresis is used to change the state of a sample to be analyzed to a liquid crystal phase,
By using a liquid crystal as the buffer in the capillary column, analysis is performed while maintaining the existence state of salts and ions in the liquid crystal, and accurate qualitative and quantitative ion determination is performed.
【００１１】[0011]
【発明の実施の形態】本発明の実施の形態を図面を参照
して以下に説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１は、本発明の一実施形態を説明するた
めの図であり、液晶中の正イオンの分析を行った装置の
概略構成を示している。この装置自体は、従来のキャピ
ラリー電気泳動装置である。FIG. 1 is a view for explaining one embodiment of the present invention, and shows a schematic configuration of an apparatus for analyzing positive ions in a liquid crystal. This apparatus itself is a conventional capillary electrophoresis apparatus.
【００１３】キャピラリーカラム１内を液晶（清浄な液
晶）で満たし、正極４側のキャピラリーカラム先端に試
料（試料液晶）３を付着する。The interior of the capillary column 1 is filled with liquid crystal (clean liquid crystal), and a sample (sample liquid crystal) 3 is attached to the end of the capillary column on the positive electrode 4 side.
【００１４】正イオンの検出は、バッファー２の液晶に
キレート剤α−ＩＳＯＣを３ｍｍｏｌ／ｌ溶かし、２９
０ｎｍの吸光度変化により行った。すなわち、キャピラ
リーの両端の電極である正極４、負極５間に電圧を印加
すると、試料液晶３中のイオンだけが電気泳動してＵＶ
検出器６側へ移動しＵＶ検出器６にて検出される。な
お、負イオンの検出には各電極に印加する電位を逆極性
（例えば正極側を負極）とすればよい。The detection of positive ions is performed by dissolving the chelating agent α-ISOC in the liquid crystal of buffer 2 at 3 mmol / l,
The measurement was performed by changing the absorbance at 0 nm. That is, when a voltage is applied between the positive electrode 4 and the negative electrode 5 which are electrodes at both ends of the capillary, only ions in the sample liquid crystal 3 are electrophoresed and UV
It moves to the detector 6 side and is detected by the UV detector 6. In order to detect a negative ion, the potential applied to each electrode may be set to the opposite polarity (for example, the positive electrode side is a negative electrode).
【００１５】上記の測定系を用いて、強制的にイオンで
汚染した液晶中の正イオンの定性と定量を行った。Using the above-described measurement system, qualitative and quantitative determination of positive ions in the liquid crystal which was forcibly contaminated with ions was performed.
【００１６】試料液晶３は、ネマティック液晶１ｇにＮ
ａＣｌとＮＨ4Ｃｌ、ＫＣｌの微結晶、各１００ｍｇを
入れ、液晶の透明点以上で５時間加熱し、濾過したもの
を使用した。The sample liquid crystal 3 is composed of 1 g of the nematic liquid crystal and N
100 mg each of aCl, NH 4 Cl, and KCl microcrystals were added, and the mixture was heated at a temperature higher than the clearing point of the liquid crystal for 5 hours and filtered.
【００１７】検量線の作製は、それぞれの塩の５ｐｐ
ｍ、１０ｐｐｍ、２０ｐｐｍ（重量濃度）の水溶液を標
準試料として行った。また、標準試料のマイグレーショ
ンタイム（保持時間）の比較から、イオンの定性を行っ
た。The calibration curve was prepared by preparing 5 pp of each salt.
m, 10 ppm, and 20 ppm (weight concentration) aqueous solutions were used as standard samples. In addition, the qualities of the ions were determined by comparing the migration times (retention times) of the standard samples.
【００１８】図２に、測定結果を示す。フェログラムに
はＫ+、ＮＨ4 +、Ｎａ+の順にピークが現れ、それぞれの
濃度は約５ｐｐｍ、１０ｐｐｍ、４ｐｐｍであった。な
お、イオンの定量は検量線に基づきフェログラムのピー
ク面積から算出される。FIG. 2 shows the measurement results. Peaks appeared in the order of K + , NH 4 + , and Na + in the ferogram, and their concentrations were about 5 ppm, 10 ppm, and 4 ppm. The ion quantification is calculated from the peak area of the ferogram based on the calibration curve.
【００１９】なお、上記実施形態では、キャピラリーカ
ラム１内を液晶（清浄な液晶）で満たす例を示したが、
テトラヒドロフラン等の液晶の有機溶媒で満たし、これ
により液晶や有機溶媒中のイオンを分析することもでき
る。In the above embodiment, an example was shown in which the inside of the capillary column 1 was filled with liquid crystal (clean liquid crystal).
Filling with a liquid crystal organic solvent such as tetrahydrofuran can also analyze ions in the liquid crystal and the organic solvent.
【００２０】[0020]
【発明の効果】以上説明したように、本発明のイオン分
析法は、液晶相で分析を行うため、液晶中での塩やイオ
ンの平衡状態を保つことができ、正確な液晶中のイオン
の定性及び定量分析を行うことができる。As described above, in the ion analysis method of the present invention, since the analysis is performed in the liquid crystal phase, the equilibrium state of the salts and ions in the liquid crystal can be maintained, and the accurate analysis of the ions in the liquid crystal can be performed. Qualitative and quantitative analysis can be performed.
【図１】本発明の一実施形態を説明するための図であ
る。FIG. 1 is a diagram for explaining an embodiment of the present invention.
【図２】本発明の一実施形態に係る分析法で測定したフ
ェログラムを示す図である。FIG. 2 is a diagram showing a ferrogram measured by an analysis method according to one embodiment of the present invention.
１ キャピラリーカラム ２ バッファー ３ 試料 ４ 正極 ５ 負極 ６ ＵＶ検出器 1 Capillary column 2 Buffer 3 Sample 4 Positive electrode 5 Negative electrode 6 UV detector
Claims (3)
リーカラム内のバッファー溶液に液晶を用い、液晶中の
イオンを分析することを特徴とするイオン分析方法。1. An ion analysis method characterized by using liquid crystal as a buffer solution in a capillary column in capillary electrophoresis and analyzing ions in the liquid crystal.
レート剤を所定量加え、前記キャピラリーカラム内の前
記バッファー溶液の吸光度の変化を検出してイオンの定
性及び定量分析を行うことを特徴とする請求項１記載の
イオン分析方法。2. The liquid crystal used in the buffer solution is keyed.
A predetermined amount of a rate agent is added, and the
The change in absorbance of the buffer solution is detected to determine the ion.
2. The ion analysis method according to claim 1, wherein the ion analysis is carried out .
液晶試料を付加したことを特徴とする請求項２記載のイ
オン分析方法。3. The method according to claim 1, further comprising the step of:
3. The ion analysis method according to claim 2, wherein a liquid crystal sample is added .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8021824A JP2800754B2 (en) | 1996-01-12 | 1996-01-12 | Method for analyzing ions in liquid crystals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8021824A JP2800754B2 (en) | 1996-01-12 | 1996-01-12 | Method for analyzing ions in liquid crystals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09196892A JPH09196892A (en) | 1997-07-31 |
| JP2800754B2 true JP2800754B2 (en) | 1998-09-21 |
Family
ID=12065819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8021824A Expired - Fee Related JP2800754B2 (en) | 1996-01-12 | 1996-01-12 | Method for analyzing ions in liquid crystals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2800754B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61194342A (en) * | 1985-02-22 | 1986-08-28 | Shimadzu Corp | Electrophoretic analysis |
-
1996
- 1996-01-12 JP JP8021824A patent/JP2800754B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09196892A (en) | 1997-07-31 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980609 |
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| LAPS | Cancellation because of no payment of annual fees |