Answers are grounded in this paper and cite their sources.
Plasma diazepam can be reliably estimated using a simple benzene extraction and gas-liquid chromatography with griseofulvin as internal standard. This gives reproducible results within the clinical range of plasma levels. Storage at minus 20 degrees C is recommended but is not essential for the 1st week.
No takes yet. Share an insight, caveat, or question.
Gamble et al. (1975) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: