S. Hatrik et al., SIMULTANEOUS HPLC DETERMINATION OF PHENYLUREA HERBICIDES AND THEIR CORRESPONDING ANILINES IN WATER AFTER ONLINE PRECONCENTRATION, HRC. Journal of high resolution chromatography, 17(11), 1994, pp. 756-758
On-line preconcentration on a short C-18 column, prior to HPLC with UV
and electrochemical detection, has been used for determination of som
e phenylurea herbicides and their possible degradation products, subst
ituted anilines, in water samples. With electrochemical detection the
detection limit at a signal-to-noise ratio of 3 was 5 ppt for 4-chloro
aniline and 4-bromoaniline and 7 ppt for 3,4-dichloroaniline; with UV
detection the detection limit was ca 300 ppt for all analytes.