Simultaneous Determination of 32 Pyrrolizidine Alkaloids in Two Traditional Chinese Medicine Preparations by UPLC-MS/MS

Figure 5

Selection results of CDDP preparation pretreatment formula. (a) Elution solvent selection result. (b) Acid elution volume selection result. (c) Methanol elution volume selection result. (d) Ammonia/methanol elution ratio selection result. (e) Ammonia/methanol elution volume selection result. X-axis: 1. Em, 2. Er, 3. Eu, 4. He, 5. Ic, 6. Im, 7. Jb, 8. Lc, 9. Ly, 10. Mc, 11. Re, 12. Sk, 13. Sn, 14. Sp, 15. Sv, 16. Td, 17.7-Ly, 18.7-Im, 19. EmNO, 20. ErNO, 21. EuNO, 22. HeNO, 23. IcNO, 24. ImNO, 25. JbNO, 26. LcNO, 27. LyNO, 28. McNO, 29. ReNO, 30. SnNO, 31. SpNO, 32. SvNO.

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