J. Sancenon et M. Delaguardia, MICELLAR-ENHANCED FLUOROMETRIC-DETERMINATION OF CARBENDAZIM IN NATURAL-WATERS, Analytica chimica acta, 287(1-2), 1994, pp. 49-57
A micellar enhanced flow-injection fluorimetric method was developed f
or the determination of carbendazim in natural water samples. The meth
od is based on the direct injection of 500 mu l of water into a three-
channel flow manifold in which the samples are merged with a buffer so
lution and subsequently with a surfactant solution. Two alternative pr
ocedures were used: one based on the use of sodium dodecyl sulphate mi
celles in 0.1 M HCl, which permits a 2.6-fold enhancement of the sensi
tivity found in the absence of micelles to be obtained, and the other
based on the use of cetyltrimethylammonium bromide in 0.1 M NaOH, whic
h provides a 11.6-fold enhancement of sensitivity and a limit of detec
tion of 1.3 x 10(-8) M, which corresponds to 2.5 mu g l(-1) of carbend
azim. The recovery of carbendazim in spiked water samples of different
types varied from 94 to 107%.