Aqueous micromolar solutions of glutaraldehyde produce a yellow color when treated with 20% phenol in ethanol followed by concentrated sulfuric acid or with phenol in 70% perchloric acid. The absorbance at 482 or 479 nm, respectively, is linearly related to the glutaraldehyde concentration. Of the t
Colorimetric determination of neutral sugars by a resorcinol sulfuric acid micromethod
β Scribed by Michel Monsigny; Claire Petit; Annie-Claude Roche
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 451 KB
- Volume
- 175
- Category
- Article
- ISSN
- 0003-2697
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β¦ Synopsis
A microscale colorimetric assay for neutral sugars, in which neutral sugars react with resorcinol in the presence of 75% sulfuric acid solution is described. This assay, based on the use of microtiter plates with 96 U-shaped wells is simple and easy to handle; it allows accurate determinations with small samples (20 microliters) containing 1 to 100 nmol of neutral sugars and is quite convenient for detection of glycoconjugates in chromatographic column effluents.
π SIMILAR VOLUMES
A new calorimetric method for the determination of hydroxamic acid is described. Hydroxamic acid was oxidized quantitatively by iodine to produce nitrous acid, which was thereafter determined according to the diazocoupling reaction. This method is sensitive to as little as 5 nmol of hydroxamic acid,