Fluorescence polarization-based homogeneous assay for deoxynivalenol determination in grains

   
   

A homogeneous assay for determining the deoxynivalenol (DON) content in grains uses the technique of fluorescence polarization. A grain extract is prepared by shaking a crushed grain sample with water. A mixture is prepared by combining the grain extract with a tracer and with monoclonal antibodies specific to DON. The tracer is able to bind to the monoclonal antibodies to produce a detectable change in fluorescence polarization. The tracer is prepared by conjugating DON to a suitable fluorophore. The fluorescence polarization of the mixture is measured. The DON concentration of the mixture may be calculated using a standard curve obtained by measuring the fluorescence polarization of a series of DON solutions of known concentration.

Um assay homogêneo para determinar o índice do deoxynivalenol (DON) nas grões usa a técnica do polarization do fluorescence. Um extrato da grão é preparado agitando uma amostra esmagada da grão com água. Uma mistura é preparada combinando o extrato da grão com um tracer e com os antibodies monoclonal específicos PARA DON. O tracer pode ligar aos antibodies monoclonal para produzir uma mudança detectável no polarization do fluorescence. O tracer é preparado conjugating DON a um fluorophore apropriado. O polarization do fluorescence da mistura é medido. A concentração do DON da mistura pode ser calculada usando uma curva padrão obtida medindo o polarization do fluorescence de uma série de DON soluções da concentração sabida.

 
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