Gas Chromatography Detectors - The Nitrogen Phosphorus Detector (NPD) > Page 48
An example of the separation of a series of herbicides monitored by the NPD is shown in figure 23.
Another interesting application of the NPD is in the GC analysis of the basic drugs. A chromatogram of a synthetic mixture of basic drugs using the NPD is shown in figure 24.
1.Amphetamine | 2. Methamphetamine | 3. Nicotine |
4. Ephedrine | 5. Benzocaine | 6. Nenzphetamine |
7. Lidocaine | 8. Phencyclidine | 9. Doxylamine |
10. Procaine | 11. Methadone | 12. Cocaine |
13. Imipramine | 14. Desipramine | 15. Scopolamine |
16. Codeine | 17. Morphine | 18. Oxycodone |
19. Chlordiazepoxide | 20. Heroin | 21. Flurazepam |
22. Papaverine | 23. Hydroxyzine | 24. Tioridazine |
Courtesy of Supelco Inc.
Figure 24 The Separation of Some Basic Drugs Using the NPD to Selectively Detect Compounds Containing Nitrogen