Journal: Biosensors
Article Title: Fast Detection of 2,4,6-Trinitrotoluene (TNT) at ppt Level by a Laser-Induced Immunofluorometric Biosensor
doi: 10.3390/bios10080089
Figure Lengend Snippet: A biosensor based on an immunofluorometric assay: The monoclonal antibody A1.1.1 against 2,4,6-trinitrotoluene (TNT) is labeled with the fluorescent dye Dy-654. This conjugate is briefly preincubated with the sample and pumped through the antigen-coated affinity column, which traps free antibody. Only antibody-TNT complexes reach the highly sensitive, laser-induced fluorescence (LIF) detector.
Article Snippet: In order to prepare the 4.54 mM Dy-654-NHS labeling solution, 0.2 mg of the NHS ester (0.18 µM) were dissolved in 40 µL of dry, amine-free DMF (labeling grade, Lumiprobe) and aliquoted to 10 µL portions and stored in the dark at −18 °C.
Techniques: Labeling, Affinity Column, Fluorescence