Table 4.
Extraction efficiency and matrix effect for alcohol markers in meconium
| Analyte | Extraction efficiency (n=5)
|
Matrix effect (n=5)
|
||
|---|---|---|---|---|
| Lowa | Highb | Low | High | |
| Ethyl laurate | 51.2 % | 54.6 % | 12.5 % | −21.2 % |
| Ethyl myristate | 54.9 % | 56.0 % | 16.0 % | −3.2 % |
| Ethyl linolenate | 55.4 % | 59.6 % | −44.8 % | −41.3 % |
| Ethyl palmitoleate | 57.7 % | 62.0 % | −30.2 % | −46.4 % |
| Ethyl arachidonate | 54.8 % | 56.0 % | −33.5 % | −27.7 % |
| Ethyl linoleate | 56.8 % | 51.4 % | −58.7 % | −51.7 % |
| Ethyl palmitate | 52.9 % | 54.0 % | −52.6 % | −61.0 % |
| Ethyl oleate | 58.0 % | 52.6 % | −39.8 % | −56.9 % |
| Ethyl stearate | 60.6 % | 53.0 % | −72.1 % | −84.7 % |
| Ethyl sulfate (EtS) | 65.6 % | 54.8 % | −35.3 % | −57.4 % |
| Ethyl glucuronide (EtG) | 96.5 % | 84.1 % | −45.6 % | −76.0 % |
a
Low QC concentration was 150 ng/g for ethyl laurate, ethyl palmitate, and ethyl stearate; 75 ng/g for all other FAEE; 7.5 ng/g for EtS; and 15 ng/ g for EtG
b
High QC concentration was 4,000 ng/g for all FAEE, except 2,500 ng/g for ethyl arachidonate, 450 ng/g for EtS, and 900 ng/g for EtG