I am highly interested in a detection scheme that detects not only anions from strong acids (Chloride, Nitrate, Sulfate, etc), from weak acids (acetate, formate, and so on) but also anions from weak acids with pKa values above 7 (Borate, Sulfide, Cyanide, etc.). I would like to do this in one separation. For capillary ion chromatography some years ago the charge detector has been introduced (Anal Chem 86: 11538-11546). This type detector is not yet available for narrow and normal bore column separations. Furthermore it is a destructive detector that makes hyphenation to another detector useless. Recently two dimensional detection schemes are published. They all has in common after standard suppressed conductivity detection an addition of a chemical was done to create salts from these anions which fully dissociates an d make available for conductivity detection. A publication of Liao et al. (Anal Chem 87: 793-800) adds in an intelligent way NaOH resulting in indirect conductivity signals. They also has in common that two conductivity detectors are needed.
I am looking forward to your thoughts.