关键词: FI-HPLC联机, 在线衍生富集, 镍, 铜, 汞

Abstract: Ahome designed pressure tight preconcentration column combined with the HPLCsix-port valve was used to interface the FIsorbent extraction preconcentration system and HPLC. Based on this system, a method for determination of trace amount of Ni, Cu and Hg in water samples after on-line derivatization and preconcentration as their diethyldithiocarbamate complexes has been developed. The sensitivity and selectivity can be further improved by using time programming for absorption measurement. The detection limit 0.16 μg/L, 0.41 μg/Land 1.1 μg/L, and the relativity standard deviation, 3.6%, 4.5% and 3.9%, were found for Ni(Ⅱ), Cu(Ⅱ) and Hg(Ⅱ), respectively.

Key words: FI-HPLC, On-line derivatization and preconcentration, Nickel, Copper, Mercury