A method that uses standard reversed-phase high-performance liquid chromatographic columns and UV detectors to separate and quantitate low levels of poorly absorbing or UV-transparent inorganic anions is described. The anions are separated on a reverse phase column in an ion-interaction mode with UV-absorbing quaternary ammonium compounds as the ion-interaction reagents (IIR) and detection is completely non-specific. Present detection limits are of the order of 0.5 nmoles of anion directly injected. Some important parameters in terms of retention of the samples and the system peak such as buffer and IIR concentration and nature are also discussed.
Bibliographical noteFunding Information:
This work was supportedb y a grant from the National Instituteo f Occupational Safetya nd Health (ROl-OH-00876-OH), a grant from the 3M Company, and by summers upport for W.E.B. provided by the Dow ChemicalC ompany.