Table 2 Trace element concentrations and their limits of detection in umbilical cord and maternal plasma
Trace element | Limit of detection | Cord plasma | Maternal plasma | Cord/maternal ratio (mean ± SD) | ||||
|---|---|---|---|---|---|---|---|---|
Percent <LOD (%) | Mean ± SD | Median (IQR) | Percent <LOD (%) | Mean ± SD | Median (IQR) | |||
As (nM/L) | 20 | 0 | 271.1 ± 45.4 | 266.4 (24.2) | 55.6 | 26.8 ±16.5 | 19.9 (4.9) | 11.8 ± 3.7 |
Ba (nM/L) | 72.99 | 1.9 | 3616.6 ± 3728 | 3801.8 (6530.4) | 1.9 | 2398 ± 2676 | 92.1 (5346.3) | 5.2 ± 23.9 |
Co (nM/L) | 2.54 | 0 | 4.90 ± 1.48 | 3.79 (0.43) | 0 | 10.5 ± 7.38 | 6.79 (9.08) | 0.64 ± 0.34 |
Cu (µM/L) | 0.03 | 0 | 4.10 ± 1.34 | 3.79 (0.43) | 0 | 23 ± 8.11 | 22.1 (9.6) | 0.19 (0.06) |
Cr (nM/L) | 22.85 | 0 | 69.7 ± 16.8 | 63.7 (25.4) | 79.6 | 29 ± 0.98 | 28.8 (0) | 2.43 ± 0.61 |
Fe (µM/L) | 0.33 | 0 | 6 ± 2.23 | 5.75 (2.9) | 1.9 | 5.10 ± 1.48 | 5.25 (1.67) | 1.54 ± 1.90 |
Mg (mM/L) | 0.16 | 0 | 0.62 ± 0.21 | 0.59 (0.35) | 0 | 0.83 ± 0.18 | 0.79 (0.25) | 0.75 ± 0.23 |
Mn (nM/L) | 27.3 | 20 | 61.3 ± 36.3 | 53 (44.6) | 63 | 31.9 ± 10.7 | 27.3 (1.56) | 1.99 ± 1.38 |
Se (nM/L) | 301.2 | 0 | 438.4 ± 78.6 | 440.1 (105.5) | 0 | 704 ± 199.7 | 705.9 (201) | 1.08 ± 3.02 |
Zn (µM/L) | 0.5 | 0 | 10.6 ± 2.35 | 10.5 (2.64) | 0 | 11.6 ± 2.29 | 11.6 (2.11) | 0.96 ± 0.33 |