Separation of a Mixture of Organic Acids and Their Analytical Determination
Original Publication Date: 1985-Apr-01
Included in the Prior Art Database: 2005-Feb-18
The method uses ion chromatography exclusion in a continuous mode to separate and analyze a mixture of acetic acid, citric acid, lactic acid and thiodiglycolic acid (TDGA) or a mixture containing dithiodiglycolic acid (DTDGA) in addition to these acids. The arrangement used (Fig. 1) comprises in succession 1) a supply of the eluant, which is octanesulfonic acid, 2) a pump for conveying the eluant, 3) an injection valve, 4) a separator containing an ice- type resin which is penetrated only by undissociated molecules as if it were covered by a semipermeable membrane, 5) an electrochemical detector for optionally determining DTDGA and TDGA, 6) a suppressor reducing the conductivity of the eluant, and 7) a conductivity cell for determining the acids.