FULLY AUTOMATED ONLINE SUPPORTED LIQUID MEMBRANE LIQUID-CHROMATOGRAPHIC DETERMINATION OF ANILINE DERIVATES IN ENVIRONMENTAL WATERS

The potential of an on-line combination of supported liquid membrane e xtraction and liquid chromatography for the determination of aniline d erivatives in environmental water samples has been investigated. Seven aniline derivatives (aniline, 4-chloroaniline, 2-chlororaniline, 4-ch loro-2-methylanline, 3-chloro-2-methylaniline, 2-chloro-4-methylanilin e and 3,5-dichloroaniline), covering a wide range in polarity and in d issociation constants, were chosen as model compounds. Calibrations we re linear in the 0.1-1 mu g L-1 range, with good correlation coefficie nts (r > .997). Detection limits were in the range 0.005-0.015 mu g L- 1. The total analysis time of the system is 44 min, determined by the liquid chromatographic separation and equilibration times.