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