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目的了解贵阳市市售淡水鱼体内中氟喹诺酮类抗生素(FQs)的残留情况。方法于2015年10—11月,在贵阳市3个水产批发市场(A、B、C区)采集鲤鱼(Cyprinus carpio)、鮰鱼(Leiocassis longirostris)、黄搡鱼(Pelteobagrus fulvidraco)、黄蜂鱼(Yellow catfish)、鲈鱼(Lateolabrax japonicus)5种淡水养殖鱼样品,采用超高效液相色谱-串联质谱(UPLC-MS/MS)法检测鱼肌肉组织中7种FQs(恩诺沙星、双氟沙星、诺氟沙星、氧氟沙星、环丙沙星、丹诺沙星、依诺沙星)的残留量。结果淡水鱼体内恩诺沙星和氧氟沙星检出率较高(分别为92.9%和78.6%),平均含量分别为96.5、135.1μg/kg,最高分别为636.2、488.2μg/kg,恩诺沙星超过最大允许限量(50μg/kg),超标率为42.9%;其他6种抗生素检出均较低,且均未检出诺氟沙星。鲈鱼和鮰鱼肌肉组织中FQs残留的检出率最高,其中,氧氟沙星和恩诺沙星均检出;黄蜂鱼和黄搡鱼体内检出的残留量均较低,且抗生素残留种类也较少。结论贵阳市场的淡水鱼存在一定程度的FQs污染,应进一步关注氟喹诺酮类抗生素残留量的超标情况。
Objective To understand the residues of fluoroquinolone antibiotics (FQs) in the freshwater fish market in Guiyang. Methods From October to November 2015, Cyprinus carpio, Leiocassis longirostris, Pelteobagrus fulvidraco and wasp fish were collected from three aquatic products wholesale markets (A, B and C) in Guiyang. Yellow catfish and Lateolabrax japonicus were detected by UPLC-MS / MS. Seven kinds of FQs (enrofloxacin, Star, norfloxacin, ofloxacin, ciprofloxacin, danofloxacin, enoxacin). Results The detection rates of enrofloxacin and ofloxacin in freshwater fish were higher (92.9% and 78.6%, respectively) with the average contents of 96.5 and 135.1 μg / kg and the highest ones of 636.2 and 488.2 μg / kg, respectively Norfloxacin exceeded the maximum allowable limit (50μg / kg), exceeding the standard rate of 42.9%; other six kinds of antibiotics were detected low, and norfloxacin were detected. The detection rates of FQs in sea bass and anchovy muscle were the highest, among which, ofloxacin and enrofloxacin were detected, while those of wasp and yellow catfish were lower, and the residues of antibiotics Also less. Conclusion There is a certain degree of FQs pollution in the freshwater fish market in Guiyang. We should pay more attention to the situation of exceeding the standard of fluoroquinolone antibiotic residues.