JP4071837B2 - Reagent composition for detecting ascorbic acid and test piece - Google Patents
Reagent composition for detecting ascorbic acid and test piece Download PDFInfo
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- JP4071837B2 JP4071837B2 JP20635496A JP20635496A JP4071837B2 JP 4071837 B2 JP4071837 B2 JP 4071837B2 JP 20635496 A JP20635496 A JP 20635496A JP 20635496 A JP20635496 A JP 20635496A JP 4071837 B2 JP4071837 B2 JP 4071837B2
- Authority
- JP
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- Prior art keywords
- ascorbic acid
- iron
- composition
- iii
- reagent
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- 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
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Description
【0001】
【発明の属する技術分野】
本発明は、液体試料中の、さらに詳しくは、全血、血清、血漿、尿、髄液、唾液などの生体試料中のアスコルビン酸を検出するための試薬組成物及び試験片に関する。
【0002】
【従来の技術】
液体試料中のアスコルビン酸を検出するための方法は、種々存在し、知られている。
例えば、特開昭55−142249号には、キレート剤と鉄(III)イオン(又は銅(II)イオン)との錯体、金属指示薬、緩衝剤などを用いた方法が示されている。
また、特開昭57−154056号、特開昭58−63850号、特開昭60−162954号、特開平1−259260号には、インドフェノール系色素を用いた方法が示されている。
また、特開昭54−80793号、特開昭59−106476号、特開平1−213574号には、テトラゾリウム系色素を用いた方法が示されている。
また、特開昭54−30890号には、オキサジン系色素を用いた方法が示されている。
また、特開昭48−100187号、特開昭56−8550号には、モリブデン酸を用いた方法が示されている。
また、特開昭60−6870号には、銅イオンを用いて、アスコルビン酸が酸化されて出る過酸化水素による検出を用いた方法が示されている。
【0003】
【発明が解決しようとする課題】
最近の尿試験片、例えばグルコース、潜血などの項目においては、尿中のアスコルビン酸等還元性物質の影響をある程度の濃度までは、回避できるように工夫されてきているが、充分なものではなく、還元性物質を検出するために、測定レンジが広い試験片が必要となってきている。
しかし、上記の従来技術では、100mg/dl程度までのアスコルビン酸しか検出できないという課題があった。
【0004】
【課題を解決するための手段】
本発明は、上記課題を解決するために、液体試料中のアスコルビン酸を検出するための試薬組成物において、
(i)鉄(III)化合物、
(ii)鉄(II)イオン検出試薬、
(iii)酸化剤
を含み、かつ
酸化剤がヨウ素酸塩であることを特徴とするアスコルビン酸検出用組成物である。
また、液体試料中のアスコルビン酸を検出するための試験片において、上記の試薬組成物を保持体に保持することを特徴とする試験片である。
【0005】
【発明の実施の形態】
本発明は、さらに、緩衝剤を含むことが好ましい。
緩衝剤は、リン酸緩衝液、酢酸緩衝液、マロン酸緩衝液、クエン酸緩衝液など種々用いることができる。
また、緩衝剤のpHは、2〜7であることが好ましい。
【0006】
さらに、本発明には、ポリマーや界面活性剤を含むことができる。
ポリマーは、ヒドロキシプロピルセルロース、ポリビニルピロリドン、ポリビニルアルコール、アルギン酸ナトリウム、ポリアクリル酸ナトリウム、ゼラチンなど種々用いることができる。
界面活性剤は、ポリオキシエチレンオクチルフェニルエーテル(トリトンX−100)、ポリオキシエチレンソルビタンモノラウレート(ツイーン20)、ポリオキシエチレンソルビタンモノステアレート(ツイーン60)、ポリオキシエチレンラウリルエーテル(ブリッジ35)、ポリオキシエチレンセチルエーテル(ブリッジ58)など種々用いることができる。
【0007】
本発明における鉄(III)化合物は、エチレンジアミン四酢酸一ナトリウム鉄(III)、シュウ酸アンモニュウム鉄(III)水和物、硫酸鉄(III)アンモニュウム水和物、塩化鉄(III)等のキレート化合物やイオン化合物から選択することができる。
【0008】
また、鉄(II)イオン検出試薬は、2,2’−ビピリジン、2,2’−ビキノリン、1,10−フェナントトリン等の化合物や誘導体から選択することができる。
【0009】
また、酸化剤は、ヨウ素酸ナトリウム、ヨウ素酸カリウムなどのヨウ素酸塩であるが、ヨウ素酸ナトリウムが好ましい。
本発明は、さらに、液体試料中のアスコルビン酸を検出するための液状試薬や錠剤試薬に応用することも可能である。
以下に実施例を示すが、本発明はこれに限定されるものではない。
【0010】
【実施例1】
濾紙(ワットマン社製;3MMChr)を、下記に示す試薬含浸液に含浸、乾燥した。
<処方>
2,2’−ビピリジン(ナカライテスク製) 3 g
エチレンジアミン四酢酸鉄(III)−ナトリウム 4 g
(ナカライテスク製)
ヨウ素酸ナトリウム(ナカライテスク製) 1 g
ポリビニルピロリドンK−30(ナカライテスク製) 10 g
0.5Mクエン酸/クエン酸ナトリウム緩衝液(pH4) 80 ml
エタノール 20 ml
【0011】
【実施例2】
濾紙(ワットマン社製;3MMChr)を、下記に示す試薬含浸液に含浸、乾燥した。
<処方>
1,10−フェナントロリン(ナカライテスク製) 3 g
エチレンジアミン四酢酸鉄(III)−ナトリウム 4 g
(ナカライテスク製)
ヨウ素酸ナトリウム(ナカライテスク製) 1 g
ポリビニルピロリドンK−30(ナカライテスク製) 10 g
0.5Mクエン酸/クエン酸ナトリウム緩衝液(pH4) 80 ml
エタノール 20 ml
【0012】
【比較例1】
濾紙(ワットマン社製;3MMChr)を、下記に示す試薬含浸液に含浸、乾燥した。
<処方>
2,2’−ビピリジン(ナカライテスク製) 3 g
エチレンジアミン四酢酸鉄(III)一ナトリウム 4 g
(ナカライテスク製)
ポリビニルピロリドンK−30(ナカライテスク製) 10 g
0.5Mクエン酸/クエン酸ナトリウム緩衝液(pH4) 80 ml
エタノール 20 ml
【0013】
【比較例2】
濾紙(ワットマン社製;3MMChr)を、下記に示す試薬含浸液に含浸、乾燥した。
<処方>
1,10−フェナントロリン(ナカライテスク製) 3 g
エチレンジアミン四酢酸鉄(III)一ナトリウム 4 g
(ナカライテスク製)
ポリビニルピロリドンK−30(ナカライテスク製) 10 g
0.5Mクエン酸/クエン酸ナトリウム緩衝液(pH4) 80 ml
エタノール 20 ml
【0014】
実施例1、2及び比較例1、2にて作製したこの片面に両面テープ(ソニーケミカル製;T4000)を貼り、5mm×5mmにカットし、試薬部分を得た。これを5mm×60mmのPETフィルムの先端部に貼付し、試験片を得た。
<測定方法>
実施例1、2及び比較例1、2にて作製した上記試験片の試薬部分に下記試料1〜6を7μl滴下して、各試験紙の最大吸収波長における1分後の反射率変化を、色差計(日本分光製;Σ−90)を用いて、測定した。
試料1;蒸留水
試料2;アスコルビン酸水溶液 ( 10mg/l)
試料3;アスコルビン酸水溶液 ( 30mg/l)
試料4;アスコルビン酸水溶液 ( 50mg/l)
試料5;アスコルビン酸水溶液 (100mg/l)
試料6;アスコルビン酸水溶液 (300mg/l)
ここで、最大吸収波長は、実施例1及び比較例1においては540nm、実施例2及び比較例2においては510nmとなった。
<結果>
結果として、実施例と比較例の最大吸収波長における反射率変化をまとめ、表1に示す。
【0015】
【表1】
上記結果より、実施例1、2による試験片は、比較例1、2による試験片に比べて、測定レンジはかなり広くなっている。
しかも、試薬部分の発色は、発色系であるため肉眼比色においても有利である。
【0016】
【発明の効果】
本発明によって、従来よりも広い測定レンジを持つ試験片を作製することが可能になった。[0001]
BACKGROUND OF THE INVENTION
The present invention, in a liquid sample, the detail is al, whole blood, serum, plasma, urine, spinal fluid, a reagent composition and a test strip for detecting ascorbic acid in biological samples such as saliva.
[0002]
[Prior art]
Method for detecting ascorbic acid in the liquid sample, various exist, are known.
For example, Japanese Patent Application Laid-Open No. 55-142249 discloses a method using a complex of a chelating agent and iron (III) ions (or copper (II) ions), a metal indicator, a buffering agent and the like.
JP-A-57-154056, JP-A-58-63850, JP-A-60-162955, and JP-A-1-259260 show methods using indophenol dyes.
JP-A-54-80793, JP-A-59-106476, and JP-A-1-213574 disclose a method using a tetrazolium dye.
JP-A-54-30890 discloses a method using an oxazine dye.
Japanese Patent Application Laid-Open Nos. 48-1000018 and 56-8550 disclose methods using molybdic acid.
Japanese Patent Laid-Open No. 60-6870 discloses a method using detection with hydrogen peroxide which is produced by oxidizing ascorbic acid using copper ions.
[0003]
[Problems to be solved by the invention]
In recent urine test specimens such as glucose and occult blood, it has been devised to avoid the effects of reducing substances such as ascorbic acid in urine to a certain level, but it is not sufficient. In order to detect a reducing substance, a test piece having a wide measurement range is required.
However, the above conventional technique has a problem that only ascorbic acid up to about 100 mg / dl can be detected.
[0004]
[Means for Solving the Problems]
To solve the above problems, the present invention provides a reagent composition for detecting ascorbic acid in a liquid sample.
(I) an iron (III) compound,
(Ii) an iron (II) ion detection reagent,
(Iii) an oxidizing agent only contains, and
The composition for detecting ascorbic acid, wherein the oxidizing agent is iodate .
Further, in the test piece for detecting ascorbic acid in the liquid sample, the test composition is characterized in that the reagent composition is held on a holding body.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention preferably further includes a buffer.
Various buffers such as a phosphate buffer, an acetate buffer, a malonate buffer, and a citrate buffer can be used.
Moreover, it is preferable that pH of a buffering agent is 2-7.
[0006]
Further, the present invention can include a polymer and a surfactant.
Various polymers such as hydroxypropyl cellulose, polyvinyl pyrrolidone, polyvinyl alcohol, sodium alginate, sodium polyacrylate, gelatin and the like can be used.
Surfactants include polyoxyethylene octyl phenyl ether (Triton X-100), polyoxyethylene sorbitan monolaurate (Tween 20), polyoxyethylene sorbitan monostearate (Tween 60), polyoxyethylene lauryl ether (Bridge 35). ), Polyoxyethylene cetyl ether (bridge 58), and the like.
[0007]
The iron (III) compound in the present invention is a chelate compound such as ethylenediaminetetraacetic acid monosodium iron (III), ammonium oxalate iron (III) hydrate, iron (III) ammonium hydrate, iron (III) chloride, etc. Or an ionic compound.
[0008]
The iron (II) ion detection reagent can be selected from compounds and derivatives such as 2,2′-bipyridine, 2,2′-biquinoline, 1,10-phenanthrin.
[0009]
Further, the oxidizing agent is sodium iodate, although Ru iodate der, such as potassium iodate, sodium iodate is preferred.
The present invention can also be applied to liquid reagents and tablet reagents for detecting ascorbic acid in a liquid sample.
Examples are shown below, but the present invention is not limited thereto.
[0010]
[Example 1]
A filter paper (manufactured by Whatman; 3MMChr) was impregnated in the reagent impregnation solution shown below and dried.
<Prescription>
2,2'-bipyridine (manufactured by Nacalai Tesque) 3 g
Ethylenediaminetetraacetic acid iron (III) -sodium 4 g
(Nacalai Tesque)
Sodium iodate (manufactured by Nacalai Tesque) 1 g
Polyvinylpyrrolidone K-30 (manufactured by Nacalai Tesque) 10 g
0.5 M citrate / sodium citrate buffer (pH 4) 80 ml
Ethanol 20 ml
[0011]
[Example 2]
A filter paper (manufactured by Whatman; 3MMChr) was impregnated in the reagent impregnation solution shown below and dried.
<Prescription>
1,10-phenanthroline (manufactured by Nacalai Tesque) 3 g
Ethylenediaminetetraacetic acid iron (III) -sodium 4 g
(Nacalai Tesque)
Sodium iodate (manufactured by Nacalai Tesque) 1 g
Polyvinylpyrrolidone K-30 (manufactured by Nacalai Tesque) 10 g
0.5 M citrate / sodium citrate buffer (pH 4) 80 ml
Ethanol 20 ml
[0012]
[Comparative Example 1]
A filter paper (manufactured by Whatman; 3MMChr) was impregnated in the reagent impregnation solution shown below and dried.
<Prescription>
2,2'-bipyridine (manufactured by Nacalai Tesque) 3 g
Ethylenediaminetetraacetic acid iron (III) monosodium 4 g
(Nacalai Tesque)
Polyvinylpyrrolidone K-30 (manufactured by Nacalai Tesque) 10 g
0.5 M citrate / sodium citrate buffer (pH 4) 80 ml
Ethanol 20 ml
[0013]
[Comparative Example 2]
A filter paper (manufactured by Whatman; 3MMChr) was impregnated in the reagent impregnation solution shown below and dried.
<Prescription>
1,10-phenanthroline (manufactured by Nacalai Tesque) 3 g
Ethylenediaminetetraacetic acid iron (III) monosodium 4 g
(Nacalai Tesque)
Polyvinylpyrrolidone K-30 (manufactured by Nacalai Tesque) 10 g
0.5 M citrate / sodium citrate buffer (pH 4) 80 ml
Ethanol 20 ml
[0014]
A double-sided tape (manufactured by Sony Chemicals; T4000) was applied to one side produced in Examples 1 and 2 and Comparative Examples 1 and 2, and cut into 5 mm × 5 mm to obtain a reagent portion. This was stuck on the front-end | tip part of 5 mm x 60 mm PET film, and the test piece was obtained.
<Measurement method>
7 μl of the following samples 1 to 6 were dropped on the reagent portions of the test pieces prepared in Examples 1 and 2 and Comparative Examples 1 and 2, and the reflectance change after 1 minute at the maximum absorption wavelength of each test paper was Measurement was performed using a color difference meter (manufactured by JASCO; Σ-90).
Sample 1; Distilled water sample 2; Ascorbic acid aqueous solution (10 mg / l)
Sample 3; ascorbic acid aqueous solution (30 mg / l)
Sample 4: Ascorbic acid aqueous solution (50 mg / l)
Sample 5: Ascorbic acid aqueous solution (100 mg / l)
Sample 6: Ascorbic acid aqueous solution (300 mg / l)
Here, the maximum absorption wavelength was 540 nm in Example 1 and Comparative Example 1, and 510 nm in Example 2 and Comparative Example 2.
<Result>
As a result, the change in reflectance at the maximum absorption wavelength in Examples and Comparative Examples is summarized and shown in Table 1.
[0015]
[Table 1]
From the above results, the measurement range of the test pieces according to Examples 1 and 2 is considerably wider than that of the test pieces according to Comparative Examples 1 and 2.
In addition, since the coloring of the reagent portion is a coloring system, it is advantageous also in the naked eye colorimetry.
[0016]
【The invention's effect】
The present invention makes it possible to produce a test piece having a wider measurement range than before.
Claims (8)
(i)鉄(III)化合物、
(ii)鉄(II)イオン検出試薬、
(iii)酸化剤
を含み、かつ
酸化剤がヨウ素酸塩であることを特徴とするアスコルビン酸検出用組成物。In a reagent composition for detecting ascorbic acid in a liquid sample,
(I) an iron (III) compound,
(Ii) an iron (II) ion detection reagent,
(Iii) An ascorbic acid detection composition comprising an oxidizing agent, and the oxidizing agent is an iodate.
塩化鉄(III)のキレート化合物又はイオン化合物から選ばれることを特徴とする請求項1に記載のアスコルビン酸検出用組成物。Iron (III) compound is ethylenediaminetetraacetic acid monosodium iron (III), ammonium oxalate iron (III) hydrate, iron (III) ammonium sulfate hydrate, and chelate or ionic compound of iron (III) chloride The composition for detecting ascorbic acid according to claim 1, wherein the composition is selected from.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20635496A JP4071837B2 (en) | 1996-07-02 | 1996-07-02 | Reagent composition for detecting ascorbic acid and test piece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20635496A JP4071837B2 (en) | 1996-07-02 | 1996-07-02 | Reagent composition for detecting ascorbic acid and test piece |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1019874A JPH1019874A (en) | 1998-01-23 |
JP4071837B2 true JP4071837B2 (en) | 2008-04-02 |
Family
ID=16521933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20635496A Expired - Fee Related JP4071837B2 (en) | 1996-07-02 | 1996-07-02 | Reagent composition for detecting ascorbic acid and test piece |
Country Status (1)
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JP (1) | JP4071837B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5152130B2 (en) * | 2009-09-08 | 2013-02-27 | 住友金属鉱山株式会社 | Simple analysis method and inspection kit for iron contained in dust |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55142249A (en) * | 1979-04-24 | 1980-11-06 | Shionogi & Co Ltd | Reduction type ascorbic acid detecting composition and test piece |
DE3012368C2 (en) * | 1980-03-29 | 1982-04-15 | Boehringer Mannheim Gmbh, 6800 Mannheim | Methods and diagnostic means for the detection of redox reactions |
US5264348A (en) * | 1991-05-13 | 1993-11-23 | Miles Inc. | Ascorbate interference-resistant composition, device and method of assaying for predetermined analyte |
-
1996
- 1996-07-02 JP JP20635496A patent/JP4071837B2/en not_active Expired - Fee Related
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Publication number | Publication date |
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JPH1019874A (en) | 1998-01-23 |
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