英语翻译Blood samples,9 mL per time point,were obtained prior to

英语翻译
Blood samples,9 mL per time point,were obtained prior to drug administration and at 5,10,20,30,and 45 minutes and at 1,2,4,6,8,12 and 24 hours after diazepam administration.The whole blood was placed into tubes containing lithium heparin,immediately placed on ice after collection,centrifuged at 3000 ×g for 20 minutes within 2 hours of collection,and the plasma was separated and stored frozen at −70 C prior to drug analysis.