El reactivo de Mayer se emplea para la caracterízación no específica de alcaloides. La mayoría de los alcaloides reaccionan dando un precipitado blanco o amarillo claro, amorfo o cristalino.[1] El precipitado (una sal compleja) puede disolverse posteriormente en algún solvente menos polar para su identificación.[2]
↑ Krishnaswamy, N. R. (2003). «p. 87». Chemistry of Natural Products: A Laboratory Handbook. Orient Blackswan. p. 87. ISBN 8173714525, 9788173714528. «This reagent which gives a white or pale yellow precipitate with solution of an alkaloid is prepared as follows. A solution of mercuri chloride (2.72 g) in distilled water (120 ml) is mixed with a solution of potassium iodide (10 g) in distilled water (40 ml) and the mixture made up to 200 ml with the addition of distilled water.»
Houghton, Peter J.; Raman, Amala (1998). «p. 180». Laboratory handbook for the fractionation of natural extracts (illustrated edición). Springer. p. 180. ISBN 0412749106, 9780412749100. «The complex is not soluble in water but is soluble in less-polar solvents. [...] The eluate containing alkaloids can be concentrated and other preparative methods used to isolate individual alkaloids.»
Lide, David R. (2004). «8». CRC Handbook of Chemistry and Physics: A Ready-reference Book of Chemical and Physical Data (85 edición). CRC Press. p. 8-2. ISBN 0849304857, 9780849304859. «Mayer's reagent (white precipitate with most alkaloids in slightly acid solutions). Dissolve 1.358 g of HgCl2 in 60 mL of water and pour into a solution of 5 g of KI in 10 ml of H2O. Add sufficient water to make 100 mL.»
* Institute of Medicine (U.S.). Committee on Food Chemicals Codex (2003). «p. 967». Food chemicals codex (5ª, ilustrada edición). National Academies Press. p. 967. ISBN 0309088666, 9780309088664. «Mercuric-Potassium Iodide TS (Mayer's Reagent) Dissolve 1.358 g of mercuric chloride (HgCl2) in 60 mL of water. Dissolve 5 g of potassium iodide (KI) in 10 ml of water. Mix the two solutions, and add water to make 100 mL.»
Bourne, Geoffrey H.; Danielli, J. F. (1987). «p. 299». International Review of Cytology. Academic Press. p. 299. ISBN 0123643104, 9780123643100.
Datos:Q6101644
Agosto 14, 2021
reactivo, mayer, reactivo, mayer, emplea, para, caracterízación, específica, alcaloides, mayoría, alcaloides, reaccionan, dando, precipitado, blanco, amarillo, claro, amorfo, cristalino, precipitado, compleja, puede, disolverse, posteriormente, algún, solvente. El reactivo de Mayer se emplea para la caracterizacion no especifica de alcaloides La mayoria de los alcaloides reaccionan dando un precipitado blanco o amarillo claro amorfo o cristalino 1 El precipitado una sal compleja puede disolverse posteriormente en algun solvente menos polar para su identificacion 2 Preparacion EditarSe prepara disolviendo 1 358 g de cloruro mercurico y 5 000 g de yoduro de potasio por cada 100 0 ml de agua destilada 3 4 1 De acuerdo a la siguiente formula pero con un exceso de KI 5 HgCl2 4 KI K2 HgI4 2 KClReferencias Editar a b Krishnaswamy N R 2003 p 87 Chemistry of Natural Products A Laboratory Handbook Orient Blackswan p 87 ISBN 8173714525 9788173714528 This reagent which gives a white or pale yellow precipitate with solution of an alkaloid is prepared as follows A solution of mercuri chloride 2 72 g in distilled water 120 ml is mixed with a solution of potassium iodide 10 g in distilled water 40 ml and the mixture made up to 200 ml with the addition of distilled water Houghton Peter J Raman Amala 1998 p 180 Laboratory handbook for the fractionation of natural extracts illustrated edicion Springer p 180 ISBN 0412749106 9780412749100 The complex is not soluble in water but is soluble in less polar solvents The eluate containing alkaloids can be concentrated and other preparative methods used to isolate individual alkaloids Lide David R 2004 8 CRC Handbook of Chemistry and Physics A Ready reference Book of Chemical and Physical Data 85 edicion CRC Press p 8 2 ISBN 0849304857 9780849304859 Mayer s reagent white precipitate with most alkaloids in slightly acid solutions Dissolve 1 358 g of HgCl2 in 60 mL of water and pour into a solution of 5 g of KI in 10 ml of H2O Add sufficient water to make 100 mL Institute of Medicine U S Committee on Food Chemicals Codex 2003 p 967 Food chemicals codex 5ª ilustrada edicion National Academies Press p 967 ISBN 0309088666 9780309088664 Mercuric Potassium Iodide TS Mayer s Reagent Dissolve 1 358 g of mercuric chloride HgCl2 in 60 mL of water Dissolve 5 g of potassium iodide KI in 10 ml of water Mix the two solutions and add water to make 100 mL Bourne Geoffrey H Danielli J F 1987 p 299 International Review of Cytology Academic Press p 299 ISBN 0123643104 9780123643100 Datos Q6101644Obtenido de https es wikipedia org w index php title Reactivo de Mayer amp oldid 118884268, wikipedia, wiki, leyendo, leer, libro, biblioteca,
