Determination of carbofuran by flow‐injection with chemiluminescent detection

Abstract

It was found that carbofuran enhances the chemiluminescence reaction between sodium sulphite and Ce(4+) in sulphuric acid, and this formed the basis of a flow-injection system with chemiluminescence detection for determination of carbofuran. Under optimum conditions, the enhanced chemiluminescence intensity was linear, with the concentration of carbofuran in the range 8 x 10(-8)-1.0 x 10(-5) g[sol ]mL, with a detection limit of 2.84 x 10(-8) g[sol ]mL (3 s[sol ]k). The proposed method was applied to the analysis of carbofuran in cabbage, with satisfactory results.

Photoinduced chemiluminescence determination of carbamate pesticides

“…CL determination employing strong oxidants of some carbamates without sulphur in their chemical structures have been reported [24][25][26][27][28][29] in FI and multicommutation systems, but this CL behaviour was only observed in one case after UV irradiation. 29 However, as mentioned above, in the assayed conditions only the carbamate pesticides containing sulphur in their chemical structure showed a PICL response.…”

Chemiluminescence and electrochemiluminescence detection of controlled drugs

“…Under suitable conditions, the oxidation of sulfite is accompanied by a weak emission of light,100 which is often ascribed to the formation of electronically excited sulfur dioxide (first postulated over three decades ago by Stauff and Jaeschke101). The emission intensity is significantly enhanced by a variety of compounds (such as riboflavin,102 quinine,103 noscapine,104 papaverine,105 atropine,106 carbofuran107 and 3‐cyclohexylaminopropane sulfonic acid102), which can be exploited for quantitative detection. In cases in which the compounds or their oxidation products are fluorescent, the mechanism of enhancement generally involves energy transfer to the more efficient fluorophore, but the light‐producing pathways for other enhancers are yet to be fully elucidated 108, 109…”

Analysis of Pesticides by Flow Injection Coupled with Chemiluminescent Detection: A Review

“…In some cases the carbamate itself was directly oxidized, such was the case of carbaryl (Waseem 2007b) (Murillo Pulgarin 2006), carbofuran (Waseem 2007b) (Xie 2005) and tsumacide (Liu 2007a). In those cases, CL emission was sensitized by the use of substances such as rhodamine 6 G or sulfite.…”