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. Author manuscript; available in PMC: 2010 Jul 25.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2008 Nov 19;19(1):1–18. doi: 10.1038/jes.2008.71

Figure 7.

Figure 7

Diagram illustrating competitive immunoassay for 3,5,6-trichloro-2-pyridinol (TCP) determination. (A) immobilization of TCP antibody-coated magnetic beads to the internal wall of reactor tube by magnet; (B) washing beads with buffer; (C) injection of sample solution containing TCP analyte and TCP-horseradish peroxidase (TCP-HRP) for competitive immunoreaction; (D) washing beads with buffer; (E) injection of the substrate solution (TMB + H2O2) to initiate enzymatic reaction; (F) analysis of enzymatic product by electrochemical measurement. Figure adapted from Liu et al. (2005) with permission.