Table 4.
Calculated % matrix effects of serum on the peak area response of phytoestrogens and internal standard
| Analyte | Concentration (ng/mL) | Matrix effect (%) |
|---|---|---|
| Equol | 50 | 2.78 |
| 500 | 18.28 | |
| 2000 | 4.55 | |
| Daidzein | 50 | 16.38 |
| 500 | 9.08 | |
| 2000 | 2.51 | |
| Dihydrodaidzein | 50 | 13.22 |
| 500 | 15.21 | |
| 2000 | 3.00 | |
| O-DMA | 50 | 1.22 |
| 500 | 14.52 | |
| 2000 | −0.41 | |
| Genistein | 50 | 30.99 |
| 500 | 28.51 | |
| 2000 | 3.84 | |
| Glycitein | 50 | 21.01 |
| 500 | 25.33 | |
| 2000 | −0.55 | |
| Formononetin | 50 | 34.95 |
| 500 | 28.18 | |
| 2000 | 4.50 | |
| Coumestrol | 50 | 31.90 |
| 500 | 20.57 | |
| 2000 | −2.42 | |
| Biochanin A | 50 | 23.82 |
| 500 | 14.85 | |
| 2000 | 20.62 | |
| Enterodiol | 50 | 15.15 |
| 500 | 9.82 | |
| 2000 | −12.03 | |
| Enterolactone | 50 | −13.66 |
| 500 | 1.65 | |
| 2000 | −12.29 | |
| Chrysin (IS) | 200 | 25.09% |