Ohun elo yii da lori imọ-ẹrọ imunochromatography aiṣe-taara ifigagbaga, ninu eyiti Beta-lactams & Cephalosporin&Tetracyclines & Melamine ninu apẹẹrẹ ti njijadu fun goolu colloid ti a samisi antibody pẹlu Beta-lactams & Cephalosporin&Tetracyclines & Melamine idapọ antigen ti a mu lori laini idanwo. Abajade idanwo le jẹ wiwo nipasẹ oju ihoho.