Several pesticides are suspected as endocrine disrupting chemicals. Chlorin
ated pesticides such as 2,4-dichloro-phenoxyacetic acid (2,4-D) and atrazin
e, two of the suspected endocrine disrupters, are used very frequently in m
odern farming. We developed a rapid method for the measurement of atrazine
by applying a competitive immune assay to surface plasmon resonance (SPR) d
etection. This method is capable of detecting ppb levels of atrazine in 20
minutes per sample with a volume as small as 10 muL.