The Effect of Added Salt on Gelation by Divalent Metal Ions of Alginate Aqueous Solution

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Other Title
  • 二価金属イオンによるアルギン酸水溶液のゲル化に及ぼす添加塩種の影響
  • The Effect of Added Salt on Gelation by Divalent Metal lons of Alginate Aqueous Solution.

Description

The alginate is an anionic polysaccharide which is composed of 1, 4-linked p-o-mannuronic acid (M) and 1, 4-linked a-L-guluronic acid (G). It is well-known that a sodium alginate aqueous solution forms a gel by introducing divalent metal ions. In the present study, the effect of added salt on the gelation by divalent metal ions is investigated by way of rheological measurements using a cone-plate type rheometer at 25° C. The salt concentration required for gelation of the alginate aqueous solution increases in the following order; SrCl2<CaCl2<MgCl2. This result is strongly related to the fact that the affinity of divalen t metal ions for the alginate decreases in the following order; Sr2+> Ca2+> Mg2+.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1993 (10), 1184-1187, 1993-10-10

    The Chemical Society of Japan

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