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- W2347551715 abstract "The presence of sulfonamide (SA) residues in foods is largely due to the raising of animals with sulfonamide antibiotics added or polluted feedstuff. Because of interference from the matrices, the commonly used immunoassay or chromatographic method is not suitable for the analysis of multi-SAs in feedstuff. A high performance liquid chromatographic-electrospray tandem mass spectrometric (HPLC/ESI-MS-MS) method has been established for the simultaneous determination of multi-SAs including sulfadiazine (SD), sulfapyridine (SPD), sulfamerazine (SM1), sulfameter (SM), sulfamethazine (SM2), sulfamethoxypyridazine (SMP), sulfamethoxazole (SMZ), sulfamonomethoxine (SMM), sulfadimethoxine (SDM) and sulfaquinoxaline (SQX). After solvent extraction, solid phase extraction, dilution and reversed-phase HPLC separation, SAs were detected by ESI-MS-MS under multi-reaction monitoring mode. The qualification analysis was done by using retention time and distribution of diagnostic ion pairs, and the quantification was based on the peak intensity of common fragment ion m/z 156. The limits of quantification for 10 SAs were 0.5 - 2.0 microg/kg (S/N = 10). The correlation coefficient of linear calibration curve was over 0.9995 within the SAs concentration range 2.0 - 200 microg/L except for SDM and SQX. At the spiked level of 1.0 mg/kg, the average recoveries for the 10 SAs were between 70% and 92%, the relative standard deviations were under 10% for intra-day and under 15% for inter-day. Routine tests showed the method was fast, sensitive, specific, and practical for the SAs determination in feedstuff." @default.
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- W2347551715 date "2005-07-01" @default.
- W2347551715 modified "2023-09-27" @default.
- W2347551715 title "[Qualification and quantification of 10 sulfonamides in animal feedstuff by high performance liquid chromatography-electrospray tandem mass spectrometry]." @default.
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