AI Article Synopsis
- The study examines various methods for measuring artemisinin in Artemisia annua to support breeding and quality control efforts.
- It compares traditional methods like LC-MS, HPLC-ELSD, and TLC with quantitative nuclear magnetic resonance spectroscopy (qNMR) on samples from multiple locations.
- Findings indicate qNMR is a reliable and quick method for quantifying artemisinin, aligning closely with HPLC-ELSD results, while TLC showed more variability.
Article Abstract
Introduction: Since the discovery of artemisinin in the 1970s, many techniques based on diverse chromatography techniques have been developed to detect and quantify this important antiplasmodial compound. The accurate quantification of this compound in the Artemisia annua plant material is mainly needed for breeding purposes in order to cultivate higher yielding varieties. It is also important for the quality control of herbal preparations containing A. annua plant material.
Objective: To evaluate the most common validated quantification techniques (LC-MS, HPLC-ELSD and TLC) and compare the results to quantitative nuclear magnetic resonance spectroscopy (qNMR) in eight different A. annua samples collected from around the world.
Methodology: The leaf material were extracted according to standard procedures and analysed with the validated quantification techniques. For the qNMR analysis we did not employ a standard curve but instead used an internal standard (maleid acid) which is not chemically related to artemisinin.
Results: We found a significant difference between the results in this study. Compared with the qNMR results the HPLC-ELSD corresponded closely, followed by LC-MS. Quantitation with TLC led to an estimation range of -0.5 to +3.2 mg artemisinin/g of A. annua.
Conclusion: These results imply that qNMR, with the addition of an internal standard, can be used to quantify artemisinin in A. annua samples in a rapid and reproducible manner.
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