A method was developed for determining residual sulfonamide antibacterials such as sulfamethazine (SMZ), sulfamonomethoxine (SMM), sulfadimethoxine (SDM), and sulfaquinoxaline (SQ) in eggs using liquid chromatography with a photodiode array detector. The spiked and blank samples were cleaned up by using an Ultrafree-MC/PL centrifugal ultrafiltration unit. A Mightysil RP-4 GP column and a mobile...

A sensitive liquid-chromatographic method was developed for the simultaneous measurement of theophylline and caffeine within 6 min. The excellent resolution of the method allows the complete separation of theophylline, internal standard, and caffeine from frequently encountered interfering drugs including acetaminophen, acetazolamide, acetylsalicylate, ampicillin, 8-chlorotheophylline, cefazoli...

Due to the continuous release of antimicrobials into the environment, the aim of this study was to compare the frequency of detection of sulfamethazine, sulfamethoxypyridazine and trimethoprim in surface water collected from urban and rural areas in Northwestern Spain. A monitoring study was conducted with 314 river water samples analyzed by high-performance liquid chromatography coupled to tan...

We developed a simple hydrothermal technique for the fabrication of flexible integrated composite containing cerium vanadate (CeVO4) and multi-walled carbon nanotubes (MWCNTs). The CeVO4/MWCNTs possessed good conductivity interesting electrochemical catalytic performance when immobilized on glassy electrode (GCE). This CeVO4/MWCNTs-GCE sensor provided excellent analytical detection sulfonamide ...

In order to realize the efficient removal of sulfamethazine (SMZ) and overcome recycling difficulty catalysts in a heterogeneous catalytic ozonation process, low-cost natural zeolite loaded with CeO 2 Fe 3 O 4 (FC/HZ) was synthesized by co-precipitation method. The FC/HZ catalyst could completely degrade SMZ 39.6% TOC through ozonation. Moreover, exhibited high activity under wide pH range poss...