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dc.contributor.authorSangjarusvichai H.
dc.contributor.authorDungchai W.
dc.contributor.authorSiangproh W.
dc.contributor.authorChailapakul O.
dc.description.abstractIn this report, we aimed to extend our previous efforts toward the evaluation of sulfonamides (SAs) with a boron-doped diamond (BDD) electrode. We improved this method by reducing the analysis time using a monolithic column coupled with amperometric detection to determine seven sulfonamides (sulfaguanidine, sulfadiazine, sulfamethazine, sulfamonomethoxine, sulfamethoxazole, sulfadimethoxine and sulfaquinoxaline). Because of its rapid separation, low back-pressure and high separation efficiency compared to a particle-packed column, a monolithic column (100 mm × 4.6 mm) was used for sulfonamide separation. Chromatographic separation was performed in less than 8 min. The analysis was carried out using phosphate buffer (0.1 M, pH 3): acetonitrile: methanol in a ratio of 80:15:5 (v/v/v) as the mobile phase with a flow rate of 1.5 mL min-1. The optimal detection potential using hydrodynamic voltammetry was found to be 1.2 V versus Ag/AgCl. The method was applied to determine seven sulfonamides in shrimp after sample preparation by solid-phase extraction. The recoveries of the sulfonamides in spiked shrimp samples at 1.5, 5 and 10 μg g-1 were in the range of 81.7 to 97.5% with a relative standard deviation (R.S.D.) between 1.0 and 4.6%. Our methodology produced results that were highly correlated with HPLC-MS data. Therefore, we propose a method that can be used for the rapid, selective and sensitive evaluation of sulfonamides in contaminated food. © 2009 Elsevier B.V. All rights reserved.
dc.subjectBoolean functions
dc.subjectDrug products
dc.subjectHigh performance liquid chromatography
dc.subjectPhase separation
dc.subjectAmperometric detection
dc.subjectBoron doped diamond electrodes
dc.subjectChromatographic separations
dc.subjectHigh separation efficiency
dc.subjectHighly sensitive detections
dc.subjectMonolithic columns
dc.subjectRelative standard deviation (R.S.D.)
dc.subjectSulfur compounds
dc.titleRapid separation and highly sensitive detection methodology for sulfonamides in shrimp using a monolithic column coupled with BDD amperometric detection
dc.identifier.bibliograpycitationTalanta. Vol 79, No.4 (2009), p.1036-1041
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