In recent years, China's aquaculture industry has developed rapidly. Due to the increase in the degree of intensification of the aquaculture industry, aquaculture diseases are becoming more and more serious, various drugs are widely used in production, and the problem of drug residues in aquatic products has become increasingly prominent.
Sulfonamides are commonly used antibacterial and antigenic drugs. Such synthetic antibacterial agents have side effects such as allergic reactions and drug resistance, and countries in the world have strict limits on this. Therefore, monitoring the residues of such antibiotics is of positive significance for promoting the export of aquatic products and ensuring the safety of animal-derived food. At present, there are many standards for the determination of sulfonamide antibiotic drug residues in China, such as the national standard (GB / T22951-2008), commodity inspection (SN0208-93) and the Ministry of Agriculture (NY1077-1-2008). These standards are determined using liquid phase or liquid mass spectrometry.
Shimadzu analysis center mainly refers to "Ministry of Agriculture Announcement No. 1077-1-2008 Determination of 17 Sulfonamides and 15 Quinolones Residues in Aquatic Products by Liquid Chromatography-Tandem Mass Spectrometry", using Shimadzu Ultra Fast Liquid Phase The chromatograph UFLCXR and triple quadrupole mass spectrometer LCMS-8040 were used in combination to establish a detection scheme for the determination of sulfonamides residues in aquatic products.
This scheme establishes a method for the simultaneous determination of sulfonamides residues in aquatic products using Shimadzu ultra fast liquid chromatograph UFLCXR and triple quadrupole mass spectrometer LCMS-8040. With the help of ultra-fast liquid chromatography UFLCXR to achieve rapid separation within 5 minutes, the triple quadrupole mass spectrometer LCMS-8040 was used for quantitative analysis, so it was possible to quickly and accurately determine the residual amounts of 12 sulfonamides.
The linearity of these 12 sulfonamides is good, and the correlation coefficients are all greater than 0.999; the precision experiment results of different concentrations show that the relative standard deviations of retention time and peak area are between 0.05 ~ 0.40% and 1.00 ~ 5.57%, respectively, and the precision of the instrument Good; the detection limit of the instrument is 0.10 ~ 0.24μg / L, the limit of quantification is 0.41 ~ 0.97μg / L; the sample recovery rate is between 85.7 ~ 116.5%, and the limit of quantification of the method is 0.20μg / kg. This method is fast, simple, highly selective and highly sensitive, and has reference value.
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