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Raw material negative control spike recovery resultsa
| Analyte | Mean expected concentration, % (w/w) |
Mean recovery, % |
RSD, % |
|---|---|---|---|
| Caftaric acid | 35.8 | 108 | 10.5 |
| Chlorogenic acid | 4.50 | 114 | 9.80 |
| Cynarin | 8.90 | 94.9 | 7.60 |
| Echinacoside | 53.3 | 91.7 | 9.50 |
| Cichoric acid | 51.9 | 90.0 | 3.50 |
| Overall recovery for all analytes, % | 99.8 | — | |
125 mg P. quinquefolius L. (North American ginseng) powder.
