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Abstract: Abstract: A selective imprinted amino-functionalized silica gel sorbent was prepared by combining a surface molecular imprinting technique with a solgel process for online solid-phase extractionHPLC determination of three trace sulfonamides in pork and chicken muscle. The imprinted functionalized silica gel sorbent exhibited selectivity and fast kinetics for the adsorption and desorption of sulfonamides. With a sample loading flow rate of 4 mL min1 for 12.5 min, enhancement factors and detection limits for three sulfonamides (S/N = 3) were achieved. The precision (RSD) for nine replicate online sorbent extractions of 5 ¦g L1 sulfonamides was less than 4.5%. The sorbent also offered good linearity (r2 > 0.99) for online solid-phase extraction of trace levels of sulfonamides. The method was applied to the determination of sulfonamides in pork and chicken muscle samples. The prepared polymer sorbent shows promise for online solid-phase extraction for HPLC determination of trace levels of sulfonamides in pork and chicken samples.
Template and target information: sulfonamides, sulfamethazine, SMZ, STZ, sulfathiazole, SMR, sulfamerazine
Author keywords: sulfonamides, sol-gel, Molecularly imprinted polymers, solid phase extraction, high-performance liquid chromatography