Table 4 The percentage of interfering epimer (E) and isobars (I) in serum.
From: Misleading measures in Vitamin D analysis: A novel LC-MS/MS assay to account for epimers and isobars
Volunteers | 25OHD | E | I | 25OHD+E+I | Total E+I | % E+I | ||
|---|---|---|---|---|---|---|---|---|
| Â | ng/mL | ng/mL | % | ng/mL | % | ng/mL | ng/mL | of total |
1 | 9.8 | 1.8 | 11.8 | 3.6 | 23.7 | 15.2 | 5.4 | 35.5 |
2 | 16.5 | 0.5 | 2.6 | 2.3 | 11.9 | 19.3 | 2.8 | 14.5 |
3 | 6.7 | 2.5 | 16.7 | 5.8 | 38.7 | 15.0 | 8.3 | 55.3 |
4 | 17.7 | 1 | 4.7 | 2.5 | 11.8 | 21.2 | 3.5 | 16.5 |
5 | 9 | 0 | 0.0 | 0 | 0.0 | 9.0 | 0 | 0.0 |