Immunofluorescence sensor for water analysis

We demonstrated a bulk optical fluorescence based immunosensor capable of multianalyte water analysis. Calibration curves obtained for 2,4-dichlorophenoxyacetic acid (2,4-D) and simazine had detection limits of 0.035 and 0.026 μg l −1, respectively. The sensor is reusable due to its regenerability and cost effective due to the use of components customary in the trade. A concept for the detection of a varying range of analytes on the same transducer is discussed. In addition, the effect on the sensor response of a thin high index film deposited on the transducer surface is studied.