B. Sendra et al., Determination of pindone in baits by using time-resolved lanthanide-sensitized luminescence and kinetic methodology, ANAL LETTER, 32(9), 1999, pp. 1835-1846
A simple and fast kinetic method for the determination of pindone in baits
was developed. It is based on the inhibitory effect of this indanedione rod
enticide on the luminescence of the europium(III)-thenoyltrifluoracetone sy
stem in the presence of cetyltrimethylammonium bromide. The relatively long
lifetime of this system allows the time-resolved mode to be used, which el
iminates any fluorescence signal. To avoid the potential static background
signal of the sample, the difference between the initial rate obtained in t
he absence and presence of pindone is used as the analytical parameter, whi
ch is obtained within only 0.2 s with the aid of a stopped-now mixing techn
ique. The calibration graph is linear in the range 0.1-10.0 mu g ml(-1) pin
done and the detection limit is 0.04 mu g ml(-1). The relative standard dev
iation is close to 3%. The recoveries obtained by applying the method direc
tly to the analysis of bait samples ranged from 92.0 to 114%.