A method was developed for the simultaneous ion chromatographic analysis of anions and cations. Analyte flow began at the injection valve and proceeded to a cation separator. Separated cations were detected at a conductivity dectector. After leaving the conductivity detector, ions traveled to the anion separator column for separating the anions. In an anion suppressor column, previously separated and detected cations were removed. As a final step, separated anions were detected in an electrochemical detector. Stock solutions of 1,000 parts per million were prepared for fluoride (16984488), chloride (16887006), nitrite (14797650), bromide (24959679), nitrate (14797558), phosphate (14265442), sulfite (14265453), sulfate (14808798), sodium (7440235), potassium (7440097), rubidium (7440177), and cesium (7440462) ions. Ion chromatograms were prepared for each with the above modifications of technique. Detection limits were determined for fluoride, chloride, bromide, phosphate, sulfate, sodium, and potassium ions. A mixture of lithium/carbonate and lithium/acetate/dehydrate was used as eluent. A standard solution of mixed ions was also analyzed to determine stability and reproducibility of the system. Analysis time for simultaneous separation was approximately 12 minutes, with cations eluting in about 8 minutes and anions taking 12 minutes. The lowest retention time was 2.7 minutes for fluoride and the highest was 11.6 for cesium. Detection limits for selected ions were: fluoride, 0.4 milligrams per liter (mg/l); chloride, 0.3mg/l; bromide, 0.1mg/l; phosphate, 1.2mg/l; sulfate, 1.1mg/l; sodium, 5.0mg/l; and potassium, 5.0mg/l. Results of repeated analysis of the standard solution showed that the system was stable and precise. The authors conclude that the proposed technique is reliable, rapid, and easy to perform. Commercially available components can be used.