Development of a dispersive liquid-liquid microextraction method for the determination of sulfonamide residues in water samples by high performance liquid chromatography
Jin Zhang
Abstract
Jin Zhang
Abstract
A novel method for the determination of sulfanilamide( SAD),sulfadiazine( SDZ) and sulfamethazine( SM2) residues in water samples has been developed by using dispersive liquid-liquid microextraction( DLLME)coupled with high performance liquid chromatography with DAD detection. Parameters such as type and volume of extraction solvent and disperser solvent,concentration and composition of sodium chloride and pH were optimized. The analytes were extracted under optimized pretreatment conditions. Linearity in the concentration range of 1 ~ 1000 μg /L was obtained with regression coefficients ranging from 0. 9997 to 0. 9999 and LODs were between 0. 07 and 0. 25 μg /L. The developed method was applied to the determination of the sulfonamides in five different water samples. The spiked recoveries were from 82. 0% to 104. 0% and the relative standard deviation( RSD) was less than 5. 9%( n = 6).
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A novel method for the determination of sulfanilamide( SAD),sulfadiazine( SDZ) and sulfamethazine( SM2) residues in water samples has been developed by using dispersive liquid-liquid microextraction( DLLME)coupled with high performance liquid chromatography with DAD detection. Parameters such as type and volume of extraction solvent and disperser solvent,concentration and composition of sodium chloride and pH were optimized. The analytes were extracted under optimized pretreatment conditions. Linearity in the concentration range of 1 ~ 1000 μg /L was obtained with regression coefficients ranging from 0. 9997 to 0. 9999 and LODs were between 0. 07 and 0. 25 μg /L. The developed method was applied to the determination of the sulfonamides in five different water samples. The spiked recoveries were from 82. 0% to 104. 0% and the relative standard deviation( RSD) was less than 5. 9%( n = 6).
Key concepts: Chemistry, Chromatography, Disperser, Solvent, Extraction (chemistry), Analyte, Sulfadiazine, Sulfanilamide