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8 Maximum Time-to-Signal
No maximum time.
Approved by the AOAC Stakeholder Panel on Infant Formula and Adult Nutritionals (SPIFAN). Final Version Date: April 5,
2011. Effective Date: June 29, 2011.
Table 1. Method performance requirements
a
Analytical range
0.50–300
b
Limit of detection
(LOD)
≤0.10
b
Limit of quantitation
(LOQ)
≤0.50
b
Repeatability (RSD
r
)
0.50–21.5
b
≤11%
>21.5
b
≤7%
Recovery
90–110%
Reproducibility (RSD
R
)
0.5–21.5
b
≤32%
>21.5
b
≤16%
a
Concentrations apply to (
1
) “ready-to-feed”
liquids “as is”; (
2
) reconstituted powders (25 g
into 200 g water); and (
3
) liquid concentrates
diluted 1:1 by weight.
b
µg/100 g expressed as folic acid in reconstituted
final product.