Ohun elo yii da lori imọ-ẹrọ imunochromatography aiṣe-taara ifigagbaga, ninu eyiti awọn metabolites Nitrofurans ninu apẹẹrẹ ti njijadu fun goolu colloid ti a samisi antibody pẹlu Nitrofurans metabolites idapọ antijeni ti o mu lori laini idanwo. Abajade idanwo le jẹ wiwo nipasẹ oju ihoho.