Development of an enzyme immunoassay for the determination of the herbicide metsulfuron-methyl based on chicken egg yolk antibodies

E. Welzig, H. Pichler, R. Krska, D. Knopp, R. Niessner

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The development of an indirect competitive enzyme immunoassay for the sulfonylurea herbicide metsulfuron-methyl (MSM) is described. In contrast to traditional antibody generation in mammals, this extremely sensitive method is based on chicken egg yolk antibodies (IgY). They were raised in laying hens using an MSM-derivative-BSA hapten as immunogen. With a 1:10000 dilution of the antibody solution and a coating antigen (MSM-derivative-KLH) concentration of 10 μg L-1 the IC50 value achieved for the target analyte was 0.4 μg L-1. The least detectable dose was established at 13 ng L-1. Cross-reactivity was tested with 5 structurally related compounds, where only sulfometuron showed a significant binding. The ELISA was tested with spiked tap and surface water samples. This paper, for the first time, demonstrates the production of high-affinity IgY antibodies for a herbicide compound.

Original languageEnglish
Pages (from-to)279-288
Number of pages10
JournalInternational Journal of Environmental Analytical Chemistry
Volume78
Issue number3-4
DOIs
StatePublished - 2000
Externally publishedYes

Keywords

  • ELISA
  • Egg yolk antibodies
  • Herbicide
  • IgY
  • Metsulfuron-methyl

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