Fig. 3From: Simultaneous determination of 14 analgesics in postoperative analgesic solution by HPLC–DAD and LC–MS/MSChromatogram of the standard drug mixture sample obtained after 20 µL injection. (LC–MS/MS). Notes: 1. morphine, 2. hydromorphone, 3. oxycodone, 4. ketamine, 5. tramadol, 6. dezocine, 7. ropivacaine, 8. remifentanil, 9. butorphanol, 10. bupivacaine, 11. droperidol, l2. fentanyl, 13. lornoxicam, 14. sufentanilBack to article page