食品科学 ›› 2011, Vol. 32 ›› Issue (21): 148-151.doi: 10.7506/spkx1002-6630-201121030

• 生物工程 • 上一篇    下一篇

诺氟沙星免疫学检测方法的建立及优化

姜金庆1,2,李广领2,王自良2,*,刘兴友2,杨雪峰1,黄华国1   

  1. 1.河南科技学院动物科学学院 2.动物疫病和残留物防控河南省高校工程技术研究中心
  • 出版日期:2011-11-15 发布日期:2011-11-11
  • 基金资助:
    河南省高校科技创新人才支持计划资助项目(2010HASTIT026)

Development and Optimization of Immunoassay Method for Detection of Norfloxacin Residues

JIANG Jin-qing1,2,LI Guang-ling2,WANG Zi-liang2,*,LIU Xing-you2,YANG Xue-feng1,HUANG Hua-guo1   

  1. (1. College of Animal Science, Henan Institute of Science and Technology, Xinxiang 453003, China;2. Henan Higher Education Engineering Technology Research Center for Animal Diseases Control and Residues Supervison, Xinxiang 453003, China)
  • Online:2011-11-15 Published:2011-11-11

摘要: 采用优化的碳二亚胺法制备诺氟沙星(NOR)人工抗原,免疫新西兰大白兔制备多克隆抗体,建立间接竞争ELISA标准曲线。对NOR的线性检测范围为0.07~31.8ng/mL,半数抑制质量浓度(IC50)和最低检测限(LOD)分别为1.5ng/mL和0.04ng/mL。检测缓冲液中pH值和磷酸根离子浓度的最佳参数分别为7.4和10mmol/L;对甲醇和NaOH溶液(30mmol/L)的最佳调整体积分数分别为30%和10%。抗体具有广谱特异性,与环丙沙星(83.3%)、培氟沙星(78.9%)、依诺沙星(68.2%)、恩诺沙星(51.7%)和洛美沙星(41.7%)有较高的交叉反应率,可用于氟喹诺酮类药物(FQs)多残留检测方法研究。

关键词: 诺氟沙星, 氟喹诺酮, 间接竞争ELISA, 多残留检测

Abstract: Modified EDC method was employed to synthesize norfloxacin (NOR) artificial antigen and New Zealand rabbits were immunized for anti-NOR polyclonal antibody (pAb) production. An indirect competitive ELISA standard curve was established. The developed assay was sensitive and had a linear range from 0.07 to 31.8 ng/mL (R2 = 0.9627), with IC50 and LOD of respectively 1.5 ng/mL and 0.04 ng/mL. The optimal pH and phosphate ion concentration in assay buffer were determined to be 7.4 mmol/L and 10 mmol/L, respectively, and the concentration adjustments for methanol and NaOH (30 mmol/L) in dilute solutions did not exceed 30% and 10%, respectively. The produced pAb had broad-spectrum specificity and exhibited a high cross-reactivity with ciprofloxacin (83.3%), pefloxacin (78.9%), enoxacin (68.2%), enrofloxacin (51.7%) and lomefloxacin (41.7%). The results obtained suggest that the established icELISA method be used for the multi-determination of fluoroquinolone residues.

Key words: norfloxacin (NOR), fluoroquinolone (FQs), indirect competitive ELISA, multi-residue detection

中图分类号: