Systematic optimization of an SPE with HPLC-FLD method for fluoroquinolone detection in wastewater

Detection of a wide variety of human and veterinary fluoroquinolone antibiotics in municipal wastewater and wastewater-impacted surface water

“…The method has been reported elsewhere [17]; the literature has shown SPE with HPLC-FLD to be an effective means of measuring FQ antibiotics in environmental media [17][18][19][20]. Briefly, FQs were extracted from wastewater and environmental samples using weak cation exchange SPE cartridges (Oasis WCX 150 mg, 6 cc).…”

“…The FQs were quantified by fluorescence detection, which was optimized for individual antibiotics [17]. Coefficients of determination for calibration curves were generally greater than 0.999.…”

Detección de residuos de quinolonas sobre electrodos modificados con bismuto en muestras ambientales mediante voltametría de redisolución anódica

“…posteriormente, se acondicionó la muestra para lograr un pH y fuerza iónica similar a la de la solución reguladora de pH = 3,81 y se realizaron 4 diluciones seriadas en la misma, a partir de la muestra original, considerada como dilución 1 o sin diluir (M1): dilución 0,8 o 1/1,25 (M2); dilución 0,5 o 1/2 (M3); dilución 0,25 o 1/4 (M4); dilución 0,1 o 1/10 (M5). A cada una de estas soluciones (M1-5), se le estimó la turbidez mediante la determinación espectrofotométrica de la absorbancia a la longitud de onda de 254 nm (21). Finalmente, se procedió a evaluar la recuperación de ciprofloxacina (1 ppt), a partir de cada muestra (M1-5), en las condiciones optimizadas.…”

Detection method optimization, content analysis and stability exploration of natamycin in wine

“…In recent years, solid phase extraction has been successfully used in sample pre-treatment technology (Albert et al, 2011;He & Blaney, 2015;Repizo et al, 2012; Rodríguez-González, González-Castro, Beceiro-González, Muniategui-Lorenzo, & PradaRodríguez, 2014). In this study solid phase extraction was chosen to purify the wine before detection.…”