Table 4.
Single-laboratory validation data: Repeatability, % RSD of replicate sample preparationsa
| Sampleb | NE | NP | EP | PS | ME | MP | Totalc |
|---|---|---|---|---|---|---|---|
| 1 | 4.6 | 41 | 0.30 | 1.4 | 7.6 | 6.7 | 0.4 |
| 2 | 1.7 | 3.6 | 1.1 | 1.4 | 1.4 | 5.8 | 1.2 |
| 3 | 3.7 | NDd | 1.4 | 1.1 | 10.2 | ND | 1.4 |
| 4 | ND | ND | 0.30 | 0.68 | 12.0 | ND | 0.35 |
| 5 | 1.5 | 1.8 | 0.92 | 1.2 | 1.0 | ND | 0.96 |
| 6 | 8.2 | 47.1 | 1.0 | 4.5 | 1.8 | ND | 1.0 |
| 7 | ND | ND | 5.0 | 5.7 | 17.6 | ND | 5.4 |
a
NE = Norephedrine; NP = norpseudoephedrine; EP = ephedrine; PS = pseudoephedrine; ME = methylephedrine;MP = methylpseudoephedrine.
b
1 = Multicomponent granulated material containing ephedra extract; 2 = E. sinica botanical raw material; 3 = multicomponent finished product 1; 4 = ephedra powdered extract; 5 = E. sinica capsules; 6 = multicomponent finished product 2; 7 = high protein powdered drink mix.
c
Total = % RSD of total ephedrine alkaloid content.
d
ND = None detected.