analysis of changes in the ph-stat titrigram , the carbonate to aluminum ratio , the aluminum content of the supernate following centrifugation , and the adsorption of the organic solute indicates that polybasic acids may : ( a ) partially neutralize the aluminum hydroxycarbonate gel by a general acid effect , ( b ) modify the aluminum hydroxycarbonate surface by adsorption of the anionic form of the polybasic acid , ( c ) extract aluminum by the formation of a soluble complex , and ( d ) lead to the precipitation of a new crystalline phase .
C0301464
carbonate
C0052993
aluminum hydroxycarbonate gel