Interaction of iron(II) with bile salts.
Iron(II) ions react with small aggregates of cholate, glycocholate, chenodeoxycholate, and deoxycholate to form soluble and colloidal compounds. Taurocholate under conditions used does not react with the Fe2+ ion. Small aggregates of dihydroxy bile salts (predominating in the premicellar region, at concentrations of the bile salt above 1 mmol dm-3) have a larger affinity for Fe2+ compared to those formed from cholate anions. In their interactions with small aggregates of cholate anions, the Fe2+ ion shows an affinity comparable to that of Cu2+ and Cd2+ and somewhat larger than that of Zn2+. Small aggregates of cholate show a higher ability to mask Fe2+ than those of taurocholate and glycocholate. Interaction of glycocholic acid anions with Fe2+ ions is sufficient to prevent iron(II) precipitation.
Fini
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Istituto di Scienze Chimiche, Università di Bologna, Italy.
Feroci
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Fazio
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Zuman
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P
D000838:Anions; D001647:Bile Acids and Salts / Q000378:metabolism*; D002104:Cadmium / Q000378:metabolism; D002635:Chenodeoxycholic Acid / Q000378:metabolism; D019826:Cholic Acid; D002793:Cholic Acids / Q000378:metabolism; D003102:Colloids; D003300:Copper / Q000378:metabolism; D003840:Deoxycholic Acid / Q000378:metabolism; D005296:Ferrous Compounds / Q000378:metabolism*; D006000:Glycocholic Acid / Q000378:metabolism; D006868:Hydrolysis; D012995:Solubility; D013656:Taurocholic Acid / Q000378:metabolism; D015032:Zinc / Q000378:metabolism
D000838:Anions; D001647:Bile Acids and Salts; D002793:Cholic Acids; D003102:Colloids; D005296:Ferrous Compounds; D003840:Deoxycholic Acid; D002104:Cadmium; D002635:Chenodeoxycholic Acid; D013656:Taurocholic Acid; D003300:Copper; D019826:Cholic Acid; D006000:Glycocholic Acid; D015032:Zinc