Method | Enzyme | Half-life (days) | Sample 1 (Time after incident) | Sample 2 (Baseline) (Time after incident) | Sample details |
---|---|---|---|---|---|
Enzyme assay | AChE—Red blood cell (RBC) | 33 | Preferably 4 – 48 h | 2–3 months a | Standard protocolg |
BChE—Plasma | 12 | Preferably 4 – 24 h | 1–2 months a | Standard protocolg | |
NTEe (lymphocytic) | 5–7 |  | 2–3 months a | Standard protocole – Only fresh blood can be analysed c | |
Mass spec analysisf | Cresylphosphate - modified butyrylcholinesterase | Â | Â | Â | Plasma should be stored till a routine measurement is available |
AChE | 33 | 4 h – 2 weeks | One sample required only b | 4 × 6 ml in EDTA tubes d | |
BChE | 12 | 4 h – 1 week | One sample required onlyb | 4 × 6 ml in EDTA tubes d |