Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1245023 | Talanta | 2007 | 7 Pages |
Abstract
This paper deals on the determination of Strychnine, a potent and dangerous pesticide and the analytical procedure is based on the photo-induced chemiluminescence of the pesticide by means of the Multicommutation continuous-flow methodology. Small segments of the pesticide solution were sequentially alternated with segments of the solution for adjusting the suitable medium for the photodegradation. The required time of UV irradiation was obtained by stopped-flow during 150 s; then, the resulting solution formed alternated segments with the oxidizing solution containing 5 Ã 10â3 mol lâ1 Ce(IV) in 0.6 mol lâ1 nitric acid. The calibration range, from 2 μg lâ1 to 50 mg lâ1, resulted in a linear behaviour over the range 25 μg lâ1 to 20 mg lâ1 and fitting the equation: I = 4706x + 624 with a correlation coefficient of 0.9955. The limit of detection was 2 μg lâ1 and the sample throughput 15 hâ1. After testing the influence of a large series of potential interferents, the method was applied to different kinds of samples.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
A.S. Alves Ferreira, J.R. Albert-GarcÃa, J. MartÃnez Calatayud,