Separation of perfluoroalkylsulfinic acids and perfluoroalkylsulfonic acids by ion-exclusion chromatography.
Ion-exclusion chromatography has been successfully applied to the separation of a number of perfluoroalkylsulfinic acids and perfluoroalkylsulfonic acids. The separation of various perfluoroalkylsulfinic and perfluoroalkylsulfonic acids, with different alkyl groups, was investigated on a polymethacrylate-based, weakly acidic, cation-exchange resin (TSK gel OApak-A) in the H+-form and using conductimetric detection. When water was used as the eluent, these perfluoroalkylsulfinic and perfluoroalkylsulfonic acids could not be resolved. When an aqueous solution of benzoic acid and o-phthalic acid was used, the separation of each of these acids occurred. In order to improve their separation, the effect of the addition of methanol and 2,2,2-trifluoroethanol, as organic modifiers, was also investigated.
Abe
T
T
National Industrial Research Institute of Nagoya, Japan.
Baba
H
H
Itoh
E
E
Tanaka
K
K
D002138:Calibration; D002852:Chromatography, Ion Exchange / Q000379:methods*; D004563:Electrochemistry; D005461:Fluorine / Q000737:chemistry*; D013441:Sulfinic Acids / Q000737:chemistry / Q000302:isolation & purification*; D013451:Sulfonic Acids / Q000737:chemistry / Q000302:isolation & purification*
D013441:Sulfinic Acids; D013451:Sulfonic Acids; D005461:Fluorine