ФОСФАТ ЦЕЛЛЮЛОЗЫ

Химические свойства

cation exchanger ~4.4 meq/g

Использование

Cellulose phosphate is used in protein chromatography, ion exchange chromatography and cation exchange media. Cellulose phosphate (CELLPHOS) has been studied as a collector for analytical preconcentration of traces of Cd(II), Cr(III), Cu(II) and Ni(II) from aqueous sample solution and used to purify and characterize acid phosphatase from approximately 3000-year-old human bones from archeological excavations.

Подготовка

Cellulose phosphates with a low phosphorus content are obtained by reacting cellulose or linters with phosphoric acid in an urea melt. Higher phosphorus contents and a lower degradation rate of the cellulose may be obtained with excess urea at reduced reaction time (ca. 15 min) and at high temperature (ca. 140 ℃). Water-soluble cellulose phosphate with a high degree of substitution may be obtained from a mixture of phosphoric acid and phosphorus pentoxide in an alcoholic medium.