DESIGN AND APPLICATION OF A NEW PHASE SEPARATOR FOR FLOW-INJECTION LIQUID-LIQUID-EXTRACTION

A new versatile phase separator for flow injection solvent extraction has been designed and its analytical performance investigated. Manifol ds for various instrumentation and the corresponding operating procedu res have been established. Experimental results show that the newly de signed phase separator possesses several advantages over the existing ones, such as long term stability, robustness, sufficient phase separa tion and integral in situ collection of the solvent extracts at differ ent phase flow rate ratios. The detection limits for cobalt, gold, iod ide, iron, lead, nickel, nitrate and tungsten were 1.4, 0.45, 70, 1.9, 160, 0.9, 137 and 23 ng ml(-1), and the relative standard deviations 2.5, 1.3, 2.2, 2.9, 4.8, 3.6, 1.4 and 3.3%, respectively.