Table 2.

Limits of detection (pg mL ⁻¹) of toxins in buffer and other complex matrices with the ELISA microarray

	LOD (pg mL−1)
Sample	BoNT/A	BoNT/B	BoNT/C	BoNT/D	BoNT/E	BoNT/F	Ricin	SEB	Stx-1	Stx-2
Buffer	1.3	1.3	3.3	8.2	3.3	3.3	8.2	1.3	1.3	1.3
Nasal	8.2	8.2	8.2	128	21	51	51	51	21	8.2
Plasma	1.3	1.3	21	51	3.3	8.2	21	NA	1.3	8.2
Saliva	3.3	1.3	21	128	3.3	320	320	NA	8.2	8.2
Serum	8.2	3.3	3.3	128	8.2	8.2	21	NA	8.2	1.3
Stool	51	51	51	800	51	21	800	8.2	51	128
Urine	3.3	8.2	3.3	128	3.3	3.3	1.3	3.3	1.3	1.3
Milk	8.2	8.2	128	320	8.2	8.2	8.2	0.5	3.3	0.5
Baby food	21	21	51	51	21	51	51	51	21	21
Apple juice	51	128	3.3	320	3.3	51	51	1.3	8.2	3.3