FIELD: chemistry.
SUBSTANCE: sorbent contains a silica gel matrix with a grafted quaternary ammonium group and nitrogen atoms attached to it with spacers, which are a part of diamine or triamine.
EFFECT: improved operational and chromatographic characteristics, effective for the separation of inorganic anions, weakly retained organic acids, amino acids, sugars, and vitamins.
9 cl, 1 dwg, 1 tbl, 11 ex
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