食品科学 ›› 2011, Vol. 32 ›› Issue (10): 124-129.doi: 10.7506/spkx1002-6630-201110028

• 分析检测 • 上一篇    下一篇

直接竞争化学发光酶免疫法检测猪肉中磺胺嘧啶

楚金申,许 杨*,何庆华,王刘花,卢 江   

  1. 食品科学与技术国家重点实验室,南昌大学中德联合研究院
  • 出版日期:2011-05-25 发布日期:2011-04-08
  • 基金资助:
    江西省科技支撑计划项目(2007BS12501);国家“863”计划项目(2007AA10Z427)

Determination of Sulfadianzine Residues in Pork by Direct Competitive Chemiluminescence Enzyme Immunoassay

CHU Jin-shen,XU Yang*,HE Qing-hua,WANG Liu-hua,LU Jiang   

  1. State Key Laboratory of Food Science and Technology, Sino-Germany Joint Research Institute, Nanchang University, Nanchang 330047, China
  • Online:2011-05-25 Published:2011-04-08

摘要: 建立一种检测猪肉中磺胺嘧啶的简便、快速、高特异性的直接竞争化学发光酶免疫法。采用改良的过碘酸钠法制备酶标抗体,以辣根过氧化物酶催化鲁米诺-过氧化氢作为化学发光体系。经优化该方法检测条件为:利用柠檬酸缓冲液稀释抗原包被质量浓度为0.8μg/mL,酶标抗体2000倍稀释,竞争反应25min;所建立的方法分析灵敏度为2.96ng/mL,批内变异系数小于8.32%,批间变异系数小于13.4%,以猪肉为样品的分析回收率为75.6%~103.7%,与其他结构类似物未见明显交叉,所建立的标准曲线相关系数为0.9922、检测线性范围为4.14~244ng/mL、检测时间为25min,可在实际生产中应用。

关键词: 磺胺嘧啶, 直接竞争化学发光酶免疫法, 辣根过氧化物酶

Abstract: A direct competitive chemiluminescence enzyme immunoassay (DC-CLEIA) was developed to determine sulfadiazine (SD) residues in pork. Assay parameters including coating antigen (OVA-SD) and enzyme labeled antibody concentrations concentrations and reaction time were optimized to be 0.8μg/mL, 2000-fold dilution and 25 min, respectively. The analytical sensitivity of the developed method was 2.96 ng/mL, and the intra-assay and inter-assay coefficients of variation were below 8.32% and 13.4%, respectively. The recoveries for SD in negative pork spiked at three levels ranged from 75.6% to 103.7%. The McAb had no noticeable cross-reactivity to SD analogues. The standard curve displayed good linearity over the range of 4.14 to 244 ng/mL with a correlation coefficient of 0.9922. This DC-CLEIA may be used for routine detection and monitoring of SD in pork.

Key words: sulfadiazine, direct competitive chemiluminescence enzyme immunoassay, horseradish peroxidase, pork

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