periodic acid

periodic acid
/perr"uy od"ik, perr'-/, Chem.
any of a series of acids derived from I2O7 by the addition of water molecules, as HIO4 or H5IO6.
[1830-40]

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Universalium. 2010.

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  • periodic acid-Schiff reaction — A method for staining carbohydrates: adjacent hydroxyl groups are oxidized to form aldehydes by periodic acid (HIO4 ) and these aldehyde groups react with Schiff s reagent (basic fuchsin decolorised by sulphurous acid) to give a purple colour.… …   Dictionary of molecular biology

  • periodic acid-Schiff reaction — (PAS reaction) a test for the presence of glycoproteins, polysaccharides, certain mucopolysaccharides, glycolipids, and certain fatty acids in tissue sections. The tissue is treated with periodic acid, followed by Schiff s reagent. A positive… …   Medical dictionary

  • periodic acid–Schiff reaction — PAS reaction a test for the presence of glycoproteins, polysaccharides, certain mucopolysaccharides, glycolipids, and certain fatty acids in tissue sections. The tissue is treated with periodic acid, followed by Schiff s reagent. A positive… …   The new mediacal dictionary

  • periodic acid — 1. HIO4, but existing in solution usually in hydrated form; used in carbohydrate detection and analysis. SYN: metaperiodic acid. 2. Any of several iodic(VII) acids formed by the combination of iodine heptoxide, I2O7, with water. * * * per·iod·ic… …   Medical dictionary

  • periodic acid — [ˌpə:rʌɪ ɒdɪk] noun Chemistry a hygroscopic solid acid with strong oxidizing properties. Origin C19: from sense 2 of per + iodic acid …   English new terms dictionary

  • periodic acid — n. Chem. a hygroscopic solid acid containing heptavalent iodine. Etymology: PER + IODINE …   Useful english dictionary

  • periodic acid — noun Etymology: International Scientific Vocabulary per + iodic Date: 1836 any of the strongly oxidizing acids (as H5IO6 or HIO4) that are the most highly oxidized acids of iodine …   New Collegiate Dictionary

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