[Possibilities for Ellman reaction application in the presence of detergents]

Triton X-100, triton X-305, twin-80 and sodium deoxycholate in definite concentrations lower the colour intensity of the solution which contains the product of the Ellman reaction. In the case of triton X-100 the colour disappearance is due to resynthesis of the Ellman reagent from 5-thio-2-nitrobenzoate with the presence of detergent in the concentration which is higher than the critical concentration of micelle-formation.