An improved bioassay for the qualitative detection of sulphonamide and dapsone residues.

An improved method of bioassay has been described for qualitative detection of sulphonamide and dapsone residues in kidney, muscle, urine, and milk. The sensitivity to the sulphonamides tested ranged from 0.01 to 0.3 micrograms/ml or g of tissue and from 0.003 to 0.0006 micrograms/ml for dapsone. No extraction procedures are needed.