Table 2.
Comparison of quantitative results for the analysis of SRM 3238 based on developed extraction and chromatography methods using PB/EI-MS detection and those of the NIST certification.
| PB/EI-MS detection (mg/kg) | NIST-determined mass fraction (mg/kg) | Absolute percentage difference (%) | |
|---|---|---|---|
| Daidzin | 14012 ± 144 | 13400 ± 2400(1) | 4.57 |
| Glycitin | 3913 ± 32 | 3760 ± 180(2) | 4.07 |
| Genistin | 12684 ± 129 | 12700 ± 530(2) | 0.13 |
| Daidzein | 310 ± 69 | 241 ± 5(2) | 28.63 |
| Genistein | 104 ± 84 | 108 ± 10(2) | 3.70 |
1
Reference value
2
Certified value