Rapid Determination of Ractopamine Residues in Edible Animal Products by Enzyme-Linked Immunosorbent Assay: Development and Investigation of Matrix Effects

Table 2

Stability of the enzyme tracer.

Storage days	IC50  ± SD (ng mL^-1, 𝑛=3)			IC15  ± SD (ng mL^-1, 𝑛=3)
	4°C	Room temperature	37°C	4°C	Room temperature	37°C
1	0.61±0.035	0.54±0.039	0.53±0.042	0.06±0.004	0.05±0.005	0.05±0.005
3	0.42±0.037	0.47±0.035	0.44±0.044	0.04±0.005	0.04±0.006	0.04±0.005
5	0.61±0.036	0.58±0.032	0.83±0.046	0.06±0.004	0.07±0.004	0.08±0.006
7	0.66±0.038	0.53±0.041	0.90±0.052	0.07±0.005	0.06±0.006	0.10±0.007