Preparation of antibodies and development of an enzyme immunoassay for determination of atrazine in environmental samples.

Published

Journal Article

An indirect competitive enzyme-linked immunosorbent assay (ELISA) has been developed and optimized for atrazine determination in soil at different depths (0-10, 10-20, and 20-30 cm) before and after 48 h of application, corn shoot and cow milk samples collected from Dina farm, Egypt. This assay was based on a specific polyclonal antibodies (PAb) raised by immunizing New Zealand rabbits with an immunogen prepared by coupling 3-{4-(ethylamino)-6-(isopropylamino)-1,3,5-triazine-2-yl} thiopropanoic acid to bovine serum albumin (BSA) via N-hydroxysuccinimide (NHS) active ester method. The sensitivity (estimated as IC₅₀ value) was 17.5 μg mL⁻¹ with a detection limit of 0.1 ng mL⁻¹. The maximum atrazine concentration was found in soil especially in the deepest layer (325 and 890 μg kg⁻¹ before and after application, respectively). Atrazine concentration in corn shoot was 333.28, μg kg⁻¹ dry plant, while there was no detectable amount in milk. All samples screened by ELISA were validated by gas chromatography mass spectrometer procedure (GC/MS). Good correlation was achieved between the two methods (r = 0.997 for soil and 0.9814 for plant). This study demonstrates the utility and convenience of the simple, practical and cost-effective ELISA method in the laboratory for analysis of environmental samples. The method is ideal for the rapid screening of large numbers of samples in laboratories where access to GC/MS facilities, is limited or lacking.

Full Text

Duke Authors

Cited Authors

  • El-Gendy, KS; Aly, NM; Mosallam, EM; Salama, AK

Published Date

  • 2011

Published In

Volume / Issue

  • 46 / 4

Start / End Page

  • 321 - 327

PubMed ID

  • 21512930

Pubmed Central ID

  • 21512930

Electronic International Standard Serial Number (EISSN)

  • 1532-4109

Digital Object Identifier (DOI)

  • 10.1080/03601234.2011.559885

Language

  • eng

Conference Location

  • England