A detection method (200) detects analytes in a fluid sample. The detection method includes transporting magnetic and/or electric labels (5) after interaction between the sample fluid and a reagent towards a detection receptacle (1). The detection receptacle (1) is initially substantially magnetic and/or electric label (5) free. By transporting the magnetic and/or electric labels (5) after reaction, interference between unreacted reagents and magnetic and/or electric label-assisted detection can be reduced.