A Flow Injection Immunosensor for the Detection of Atrazine in Water Samples

Thakur, Shaveena and Gandhi, Sonu and Paul, A.K. and Suri, C.R. (2011) A Flow Injection Immunosensor for the Detection of Atrazine in Water Samples. Sensors & Transducers Journal, 131 (8). pp. 91-100. ISSN 1726-5479

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Abstract

Quantification of atrazine in a sample was performed using a post-reactive column consisting rabbit anti-immunoglobulin G for trapping atrazine specific antibodies bound to antigen and tracer. The assay is based on a competitive enzyme immunoassay where the analyte and known amount of tracer (peroxidase labeled hapten) bind competitively to available sites of anti-atrazine antibodies. The absorbance signal, proportional to the amount of antigen present, is generated with the unbound tracer passing through the column, and monitored continuously with a spectrophotometer. Several parameters which affect the immunosensor response were evaluated, including the flow rate through the column, stability of enzyme tracer in the column, for increasing the sensitivity of the system. The immunosensor has a detection limit of 1 ng/ml with good signal precision app. 2 % in the optimum working concentration range between 1 – 100 ng/ ml of atrazine in standard water samples

Item Type: Article
Uncontrolled Keywords: Atrazine, Flow-through immunosensor, Post-reactive column, Anti-atrazine antibody
Subjects: CSIO > Medical Instrumentation
Depositing User: Ms. J Shrivastav
Date Deposited: 22 Apr 2012 22:43
Last Modified: 22 Apr 2012 22:43
URI: http://csioir.csio.res.in/id/eprint/275

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