Abstract
Ion-interaction chromatographic data were treated by chemometric methods in order to optimize resolution and analysis time. A mixture of nitrite, nitrate, and 1,4- 1,3-, and 1,2-phenylenediamine at average 0.5 ppm levels was considered. The effect on retention of alkyl chain length of the ammonium salt used as the interaction reagent, its concentration, and flow rate were studied
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