Claims
- 1. A stabilized composition of tetrazolium salts for analytical purposes consisting of tetrazolium salt and 1-10 moles of a complex forming organic hydroxypolycarboxylic acid, which is soluble in polar solvents, per mole of said tetrazolium salt.
- 2. The composition as claimed in claim 1, containing 1 to 2 moles of said complex-forming organic hydroxypolycarboxylic acid, which is soluble in polar solvents, per mole of tetrazolium salt.
- 3. The composition as claimed in claim 1, wherein the complex forming organic hydroxypolycarboxylic acid is citric acid.
- 4. The composition as claimed in claim 1, wherein the tetrazolium salt is 3-(4',5'-dimethylthiazolyl-2)-2,4-diphenyltetrazolium bromide.
- 5. The composition as claimed in claim 1, wherein the tetrazolium salt is 2-(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyltetrazolium chloride.
- 6. The composition as claimed in claim 1, wherein the tetrazolium salt is 2,2'-di-(p-nitrophenyl)-5,5'-diphenyl-3,3'-(3,3'-dimethoxy-4,4'-diphenylene)-ditetrazolium chloride.
- 7. The composition as in claim 1, wherein said composition is a lyophilizate of said tetrazolium salt, said complex-forming organic hydroxypolycarboxylic acid and a polar solvent.
- 8. A test strip for analytical purposes consisting of an absorbent carrier having impregnated therein a composition which consists of a tetrazolium salt and from 1 to 10 moles of a complex forming organic hydroxypolycarboxylic acid which is soluble in polar solvents, per mole of said tetrazolium salt.
- 9. A stabilized composition for analytical purposes consisting of a tetrazolium salt, from 1-10 moles of a complex forming organic hydroxypolycarboxylic acid which is soluble in polar solvents, per mole of said tetrazolium salt, and a hydrogen transfer catalyst.
- 10. The composition of claim 9, wherein said catalyst is diaphorase.
- 11. The composition of claim 9, wherein said catalyst is 5-methylphenazinium methylsulphate.
- 12. A stabilized composition of tetrazolium salts for analytical purposes consisting of a tertrazolium salt, 1-10 moles of a complex forming organic hydroxypolycarboxylic acid, which is soluble in polar solvents, per mole of said tetrazolium salt, and a polar solvent in which said hydroxypolycarboxylic acid is soluble.
Priority Claims (1)
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3048662 |
Dec 1980 |
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Parent Case Info
This application is a continuation of Ser. No. 871,498, filed 6/6/86, now abandoned, which is a division of Ser. No. 593,192, filed 3/27/84, now U.S. Pat. No. 4,613,569, which is a continuation of Ser. No. 328,315, filed 12/7/81, now abondoned.
US Referenced Citations (7)
Divisions (1)
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593192 |
Mar 1984 |
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Continuations (2)
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871498 |
Jun 1986 |
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328315 |
Dec 1981 |
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