Table 2.

Commercial ELISA kits for PHAs, PCBs, and antibiotic residues.

Kit/company	Principle	LOD	Sample matrix
PAH RaPID Assay (Strategic Diagnostics Inc.)	Competition ELISA on magnetic beads	Total PHAs in ppb level	Groundwater, surface water, well water
Total petroleum hydrocarbon (TPH) (HACH)		Soil: 20, 50, 100, 200 ppm as diesel fuel Water: 2, 5, 10, 20 ppm as diesel fuel	Soil and water
Polychlorinated biphenyls (PCBs) (HACH)	Competitive colorimetric ELISA assay	Semiquantitative screening based on thresholds for PCB	Water
MaxSignal® Florfenicol ELISA Test Kit	Competitive colorimetric ELISA assay	0.2-1.0 ppb	Human samples (urine and serum) foods (milk, meat, egg, honey, etc.)
RaPID Assay® ModernWater (UK)	Competitive colorimetric ELISA assay	Soil: 0.2 ppm to 5 ppm as phenanthrene Water: 2.66 ppb to 66.5 ppb as phenanthrene	Soil and water
Aviva PAH ELISA Kit	Competition ELISA microplate	LOD 10 ng/ml	Environmental PAH samples
Abraxis Tetracyclines ELISA	Competition ELISA microplate	4.0 ppb in honey; 4.0 ppb in milk; 8.0 ppb in meat; 4.0 ppb in shrimp; 0.11 ppb in water	Food and water