Development of colloidal gold-based flow-through and lateral-flow immunoassays for the rapid detection of the insecticide carbaryl

被引:76
作者
Wang, S [1 ]
Zhang, C [1 ]
Wang, JP [1 ]
Zhang, Y [1 ]
机构
[1] Tianjin Univ, Fac Food Engn & Biotechnol, Tianjin Key Lab Food Nutr & Safety, Tianjin 300222, Peoples R China
关键词
carbaryl; flow-through; lateral-flow; colloidal gold-based immunoassay;
D O I
10.1016/j.aca.2005.04.088
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
One-step membrane-based competitive colloidal gold-based immunoassays in flow-through and lateral-flow formats for the rapid detection of carbaryl were developed. Nitro-cellulose membrane strip was separately coated with goat anti-rabbit IgG (control line) and carbaryl hapten-OVA conjugate (test line). Anti-carbaryl antibody labeled with colloidal gold particles was firstly incubated with carbaryl. A positive reaction as a result of the remaining antibody-gold conjugate combining with antigen coated on the membrane was obvious by visual detection, with detection limits for flow-through and lateral flow of 50 and 100 mu g/L, respectively. The assay time for both tests was less than 5 min, suitable for rapid testing on-site. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:161 / 166
页数:6
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