Simultaneous determination of monofluoroacetate, difluoroacetate and trifluoroacetate in environmental samples by ion chromatography.
A method is reported for the sensitive, simultaneous determination of mono- (MFA), di- (DFA), and trifluoroacetates (TFA) by ion chromatography (IC). These species were separated using a Dionex AS17 anion-exchange column employed with a potassium hydroxide gradient (via a Dionex EG40 eluent generator) and suppressed conductivity detection. The fluoroacetates were successfully separated from a range of inorganic and organic species likely to be present in environmental samples, in a total analysis time of 35 min (including re-equilibration of the column). Detection limits for mono-, di- and trifluoroacetate were 21, 38 and 36 microg/l, respectively, determined using a signal-to-noise ratio of 3, and were obtained using a sample injection volume of 50 microl. Precision was less than 0.83% relative standard deviation (RSD) for replicate injections performed over a period of 30 days. The method was applied to the determination of monofluoroacetate in river water samples and also in carrot baits.
Wang
Fang
F
Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Private Bag 75 Hobart, 7001 Tasmania, Australia.
Dicinoski
Greg W
GW
Zhu
Yan
Y
Haddad
Paul R
PR
D002853:Chromatography, Liquid / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D005463:Fluoroacetates / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D004785:Environmental Pollutants; D005463:Fluoroacetates