Analysis of Artemisia annua L. volatile oil by comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry
Abstract
Artemisia annua L. is an annual herb native of Asia, it has been used for many centuries for the treatment of fever and malaria. In this paper, analysis of the volatile oil of Artemisia annua L. was performed by comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GC x GC-TOF MS). Three hundred and three components were tentatively identified and terpene compounds are the main components of Artemisia annua L. volatile oil. Artemisinic acid is tentatively qualified.
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Only two o-menthanes and one m-menthane are reported from A. annua.
“Only two o-menthanes: o-cymene (1-isopropyl-2-methylbenzene [527-84-4] [25155-15-1]) (331) [41] and o-mentha-1(7),8-dien-3-ol ([15358-81-3]) (332) [23]; and one m-menthane: m-cymene (β-cymene; 1-methyl-3-(1-methylethyl)benzene [535-77-3]) (333) [31] are reported from A. annua.”
From The Biosynthesis of Artemisinin (Qinghaosu) and the Phytochemistry of Artemisia annua L. (Qinghao) (2010) · cites this paper as [31]
Cites
Qinghaosu (Artemisinin): an Antimalarial Drug from China
Klayman, D. L. (1985) · Science · doi:10.1126/science.3887571 · Cited by 2,186 · see citing works
Phillips, J. B., & Beens, J. (1999) · Journal of Chromatography A · doi:10.1016/s0021-9673(99)00815-8 · Cited by 403 · see citing works
Artemisinin, a Novel Antimalarial Drug: Biochemical and Molecular Approaches for Enhanced Production
Abdin, M. Z., Israr, M., Rehman, R. U., & Jain, S. K. (2003) · Planta Medica · doi:10.1055/s-2003-38871 · Cited by 252 · see citing works
Bertea, C. M., Freije, J. R., van der Woude, H., Verstappen, F. W., Perk, L., Marquez, V., De Kraker, J.-W., Posthumus, M. A., Jansen, B. J., de Groot, A., et al. (2005) · Planta Medica · doi:10.1055/s-2005-837749 · Cited by 205 · see citing works
Dallüge, J., van Stee, L. L. P., Xu, X., Williams, J., Beens, J., Vreuls, R. J. J., & Brinkman, U. A. T. (2002) · Journal of Chromatography A · doi:10.1016/s0021-9673(02)01384-5 · Cited by 191 · see citing works
Marriott, P. J., & Kinghorn, R. M. (1997) · Analytical Chemistry · doi:10.1021/ac961310w · Cited by 163 · see citing works
Terpenoids from the seeds of Artemisia annua
Brown, G. D., Liang, G.-Y., & Sy, L.-K. (2003) · Phytochemistry · doi:10.1016/s0031-9422(03)00294-2 · Cited by 153 · see citing works
Comprehensive Two-Dimensional Gas Chromatography with Fast Enantioseparation
Shellie, R. A., & Marriott, P. J. (2002) · Analytical Chemistry · doi:10.1021/ac025803e · Cited by 130 · see citing works
Lu, X., Cai, J., Kong, H., Wu, M., Hua, R., Zhao, M., Liu, J., & Xu, G. (2003) · Analytical Chemistry · doi:10.1021/ac0264224 · Cited by 117 · see citing works
Jet-Cooled Thermal Modulator for Comprehensive Multidimensional Gas Chromatography
Ledford, E. B., & Billesbach, C. A. (2000) · Journal of High Resolution Chromatography · doi:10.1002/(sici)1521-4168(20000301)23:3 · Cited by 96 · see citing works
Terpenoids from Artemisia annua and constituents of its essential oil
Ahmad, A., & Misra, L. N. (1994) · Phytochemistry · doi:10.1016/0031-9422(94)85021-6 · Cited by 87 · see citing works
Wu, J., Lu, X., Tang, W., Kong, H., Zhou, S., & Xu, G. (2004) · Journal of Chromatography A · doi:10.1016/j.chroma.2004.02.028 · Cited by 76 · see citing works
Biosynthesis of artemisinic acid in Artemisia annua
Akhila, A., Rani, K., & Thakur, R. S. (1990) · Phytochemistry · doi:10.1016/0031-9422(90)83020-2 · Cited by 41 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
The Artemisia L. Genus: A Review of Bioactive Essential Oils
Abad, M. J., Bedoya, L. M., Ticona, L. A., & Bermejo, P. (2012) · Molecules · doi:10.3390/molecules17032542 · Cited by 620 · see citing works
Comprehensive two‐dimensional gas chromatography‐mass spectrometry: A review
Mondello, L., Tranchida, P. Q., Dugo, P., & Dugo, G. (2008) · Mass Spectrometry Reviews · doi:10.1002/mas.20158 · Cited by 426 · see citing works
The Biosynthesis of Artemisinin (Qinghaosu) and the Phytochemistry of Artemisia annua L. (Qinghao)
Brown, G. D. (2010) · Molecules · doi:10.3390/molecules15117603 · Cited by 363 · see citing works
Recent developments in the application of comprehensive two-dimensional gas chromatography
Adahchour, M., Beens, J., & Brinkman, U. A. T. (2008) · Journal of Chromatography A · doi:10.1016/j.chroma.2008.01.002 · Cited by 349 · see citing works
Global characterization of Artemisia annua glandular trichome transcriptome using 454 pyrosequencing
Wang, W., Wang, Y., Zhang, Q., Qi, Y., & Guo, D. (2009) · BMC Genomics · doi:10.1186/1471-2164-10-465 · Cited by 224 · see citing works
Zeljkovıć, S. Ć., Maksimović, M., Vidić, D., & Parić, A. (2012) · Industrial Crops and Products · doi:10.1016/j.indcrop.2011.07.024 · Cited by 211 · see citing works
Plant terpenoids: applications and future potentials
Zwenger, S. R., & Basu, C. (2008) · Scholarship & Creative Works - Digital UNC a service of University Libraries (University of Northern Colorado) · doi:10.5897/bmbr2008.0001 · Cited by 211 · see citing works
Comprehensive two dimensional gas chromatography review
Cortes, H. J., Winniford, B. L., Luong, J. C., & Pursch, M. (2009) · Journal of Separation Science · doi:10.1002/jssc.200800654 · Cited by 185 · see citing works
Baharum, S. N., Bunawan, H., Ghani, M. A., Mustapha, W. A. W., & Noor, N. M. (2010) · Molecules · doi:10.3390/molecules15107006 · Cited by 132 · see citing works
Bilia, A. R., Santomauro, F., Sacco, C., Bergonzi, M. C., & Donato, R. (2014) · Evidence-based Complementary and Alternative Medicine · doi:10.1155/2014/159819 · Cited by 126 · see citing works
Lao, Y., Jiang, J., & Lu, Y. (2009) · British Journal of Pharmacology · doi:10.1111/j.1476-5381.2009.00257.x · Cited by 116 · see citing works
Qualitative and quantitative approaches in comprehensive two-dimensional gas chromatography
Murray, J. A. (2012) · Journal of Chromatography A · doi:10.1016/j.chroma.2012.05.012 · Cited by 107 · see citing works
Khangholi, S., & Rezaeinode, A. (2008) · Pakistan Journal of Biological Sciences · doi:10.3923/pjbs.2008.934.937 · Cited by 89 · see citing works
Ruan, C., & da Silva, J. A. T. (2010) · Critical Reviews in Biotechnology · doi:10.3109/07388551.2010.505908 · Cited by 77 · see citing works
Shinyuy, L. M., Loe, G. E., Jansen, O., Mamede, L., Ledoux, A., Noukimi, S. F., Abenwie, S. N., Ghogomu, S. M., Souopgui, J., Robert, A. R., et al. (2023) · Metabolites · doi:10.3390/metabo13050613 · Cited by 58 · see citing works
Application of two-dimensional chromatography in the analysis of Chinese herbal medicines
Cao, J., Wei, J., Chen, M., Su, H., Wan, J., Wang, Y., & Li, P. (2014) · Journal of Chromatography A · doi:10.1016/j.chroma.2014.10.078 · Cited by 57 · see citing works
Influence of chemical and biological treatments on volatile oil composition of Artemisia annua Linn.
Malik, A. A., Ahmad, J., Mir, S. R., Ali, M., & Abdin, M. Z. (2009) · Industrial Crops and Products · doi:10.1016/j.indcrop.2009.07.006 · Cited by 53 · see citing works
Shahrajabian, M. H., Sun, W., & Cheng, Q. (2020) · Notulae Botanicae Horti Agrobotanici Cluj-Napoca · doi:10.15835/nbha48412002 · Cited by 49 · see citing works
Comparison of Artemisia annua Bioactivities between Traditional Medicine and Chemical Extracts
Nageeb, A., Al-Tawashi, A., Emwas, A.-H. M., Al‐Talla, Z. A., & Al-Rifai, N. (2014) · Current Bioactive Compounds · doi:10.2174/157340720904140404151439 · Cited by 43 · see citing works
Chemical Composition and Antimicrobial Activity of Artemisia annua L. Essential Oil from Iran
Verdian-rizi, M., Ebrahimi, E. S., Akhoundi, A. H., Fazeli, M. R., & Hamedani, M. P. (2008) · DOAJ (DOAJ: Directory of Open Access Journals) · Cited by 39 · see citing works
Cao, G., Cai, H., Cong, X., Liu, X., Ma, X., Lou, Y., Qin, K., & Cai, B. (2012) · The Analyst · doi:10.1039/c2an35543d · Cited by 36 · see citing works
Comprehensive two-dimensional chromatography for analyzing complex samples: recent new advances
Shi, X., Wang, S., Yang, Q., Lu, X., & Xu, G. (2014) · Analytical Methods · doi:10.1039/c4ay01055h · Cited by 35 · see citing works
Costa, R., Ragusa, S., Russo, M., Certo, G., Franchina, F. A., Zanotto, A., Grasso, E., Mondello, L., & Germanò, M. P. (2015) · Journal of Pharmaceutical and Biomedical Analysis · doi:10.1016/j.jpba.2015.10.006 · Cited by 34 · see citing works
Cai, H., Cao, G., Li, L., Liu, X., Ma, X., Tu, S., Lou, Y., Qin, K., Li, S., & Cai, B. (2013) · Molecules · doi:10.3390/molecules18021368 · Cited by 33 · see citing works
Verdian-rizi, M. (2008) · African Journal of Plant Science · doi:10.5897/ajps.9000256 · Cited by 33 · see citing works
Nahrevanian, H., Milan, B. S., Kazemi, M., Hajhosseini, R., Mashhadi, S. S., & Nahrevanian, S. (2012) · Malaria Research and Treatment · doi:10.1155/2012/727032 · Cited by 32 · see citing works
Cochran, J. W. (2008) · Journal of Chromatography A · doi:10.1016/j.chroma.2008.01.043 · Cited by 32 · see citing works
Two-Dimensional Gas Chromatography Coupled With Mass Spectrometry in Food Analysis
Dymerski, T. (2017) · Critical Reviews in Analytical Chemistry · doi:10.1080/10408347.2017.1411248 · Cited by 32 · see citing works
Mohammed, S., Dekabo, A., & Hailu, T. (2022) · AMB Express · doi:10.1186/s13568-022-01346-5 · Cited by 31 · see citing works
Qin, K., Zheng, L., Cai, H., Cao, G., Lou, Y., Lu, T.-L., Shu, Y., Zhou, W., & Cai, B. (2013) · Evidence-based Complementary and Alternative Medicine · doi:10.1155/2013/237541 · Cited by 31 · see citing works
He, M., Yang, Z., Yang, T., Ye, Y., Nie, J., Hu, Y. S., & Yan, P. (2017) · Journal of Chromatography B · doi:10.1016/j.jchromb.2017.03.029 · Cited by 28 · see citing works
The physiological response of Artemisia annua L. to salt stress and salicylic acid treatment
Lin, L., Zhang, H., Zhang, L., Zhou, Y., Yang, R., Ding, C., & Wang, X. (2014) · Physiology and Molecular Biology of Plants · doi:10.1007/s12298-014-0228-4 · Cited by 27 · see citing works
Ashraf, K., Tajeri, S., Arnold, C.-S., Amanzougaghene, N., Franetich, J., Vantaux, A., Soulard, V., Bordessoulles, M., Cazals, G., Bousema, T., et al. (2021) · Life Science Alliance · doi:10.26508/lsa.202101237 · Cited by 26 · see citing works
Secondary Metabolic Profiling and Artemisinin Biosynthesis of Two Genotypes ofArtemisia annua
Wang, H., Ma, C., Ma, L., Du, Z., Wang, H., Ye, H., Li, G., Liu, B., & Xu, G. (2009) · Planta Medica · doi:10.1055/s-0029-1185814 · Cited by 26 · see citing works
Nekoei, M., Mohammadhosseini, M., & Akhlaghi, H. (2012) · Journal of Essential Oil Bearing Plants · doi:10.1080/0972060x.2012.10662595 · Cited by 24 · see citing works
Multidimensional Gas Chromatography in Essential Oil Analysis. Part 1: Technical Developments
Lebanov, L., Tedone, L., Kaykhaii, M., Linford, M. R., & Paull, B. (2018) · Chromatographia · doi:10.1007/s10337-018-3649-3 · Cited by 23 · see citing works
Lebanov, L., Tedone, L., Kaykhaii, M., Linford, M. R., & Paull, B. (2018) · Chromatographia · doi:10.1007/s10337-018-3651-9 · Cited by 22 · see citing works
The evolution of metabolic profiling in parasitology
Holmes, E. C. (2010) · Parasitology · doi:10.1017/s0031182010000260 · Cited by 19 · see citing works
Song, S., Tong, Y., Feng, T., & Zhu, J. (2018) · Journal of Essential Oil Bearing Plants · doi:10.1080/0972060x.2018.1467797 · Cited by 19 · see citing works
Son, J. H., Islam, M. A., Hong, J. H., Jeong, J. Y., Song, O. Y., Kim, H. E., Khan, N., Jamila, N., & Kim, K. S. (2021) · Food Science and Biotechnology · doi:10.1007/s10068-020-00875-8 · Cited by 17 · see citing works
Nahrevanian, H., Esmaeili, B., Kazemi, M., Nazem, H., & Amini, M. (2010) · Europe PMC (PubMed Central) · Cited by 17 · see citing works
Chemistry, biosynthesis and biological activity of artemisinin and related natural peroxides
Rydén, A.-M., & Kayser, O. (2007) · Topics in Heterocyclic Chemistry · doi:10.1007/7081_2007_085 · Cited by 16 · see citing works
Yan, C., Zeng, J., Li, H., Pan, X., Liu, J., & Wei, Y. (2023) · Microchemical Journal · doi:10.1016/j.microc.2023.108477 · Cited by 16 · see citing works
Yang, X., Zeng, P., Wen, J., Wang, C., Yao, L., & He, M. (2023) · Chinese Herbal Medicines · doi:10.1016/j.chmed.2023.07.001 · Cited by 15 · see citing works
Yang, X., Sima, Y., Luo, X., Li, Y., & He, M. (2024) · Journal of Pharmaceutical Analysis · doi:10.1016/j.jpha.2024.01.004 · Cited by 15 · see citing works
Bilia, A. R., Flamini, G., Morgenni, F., Isacchi, B., & FrancescoVincieri, F. (2008) · Natural Product Communications · doi:10.1177/1934578x0800301225 · Cited by 15 · see citing works
Tajuddin, S. N., Mohd, C. M. A. C., & Yusoff, M. M. (2016) · Tropical forestry · doi:10.1007/978-981-10-0833-7_7 · Cited by 14 · see citing works
Maciuk, A., Mazier, D., & Duval, R. A. (2023) · Natural Product Reports · doi:10.1039/d3np00001j · Cited by 10 · see citing works
Edwards, M., & Górecki, T. (2015) · Journal of Chromatography A · doi:10.1016/j.chroma.2015.05.014 · Cited by 12 · see citing works
Wu, Y., Jiang, X., Zhang, L., & Zhou, Y. (2018) · Journal of Essential Oil Bearing Plants · doi:10.1080/0972060x.2019.1574244 · Cited by 12 · see citing works
Expression and Localization of Amorpha-4,11-diene Synthase in Artemisia annua L.
Pu, G., Ma, D., Wang, H., Ye, H., & Liu, B. (2012) · Plant Molecular Biology Reporter · doi:10.1007/s11105-012-0472-0 · Cited by 11 · see citing works
Wen, W., Xiang, H., Qiu, H., Chen, J., Ye, X., Wu, L., Chen, Z., & Tong, S. (2024) · Journal of Chromatography B · doi:10.1016/j.jchromb.2024.124026 · Cited by 11 · see citing works
The monoterpene 1,8-cineole prevents cerebral edema in a murine model of severe malaria
dos Santos, E. C., Silva, L. S., Pinheiro, A. S., Teixeira¹, D. E., Peruchetti, D. B., Silva-Aguiar, R. P., Wendt, C., de Miranda, K. R., Coelho‐de‐Souza, A. N., Leal‐Cardoso, J. H., et al. (2022) · PLoS ONE · doi:10.1371/journal.pone.0268347 · Cited by 10 · see citing works
Comparison of terpene components from flowers of Artemisia annua
Zhan-nan, Y., Zhu, S.-Q., & Yu, Z. (2012) · Bangladesh Journal of Pharmacology · doi:10.3329/bjp.v7i2.10815 · Cited by 9 · see citing works
Wang, N., ZHANG, Y., Li, X., Tong, Y., Kong, H., & Xu, G. (2010) · Chinese Journal of Chromatography · doi:10.3724/sp.j.1123.2010.00329 · Cited by 8 · see citing works
Wu, Y., Jiang, X., Zhang, L., & Zhou, Y. (2017) · Journal of Essential Oil Bearing Plants · doi:10.1080/0972060x.2017.1392899 · Cited by 8 · see citing works
Sharopov, F. S., Salimov, A., Numonov, S. R., Safomuddin, A., Bakri, M., Салимов, Т. М., Setzer, W. N., & Habasi, M. (2020) · Natural Product Communications · doi:10.1177/1934578x20927814 · Cited by 8 · see citing works
Gas Chromatographic Analysis of Plant and Insect Surface Compounds: Cuticular Waxes and Terpenoids
Szafranek, B., Paszkiewicz, M., Gobiowski, M., & Stepnowski, P. (2012) · InTech eBooks · doi:10.5772/34143 · Cited by 7 · see citing works
Wan, L., Huo, J., Huang, Q., Ji, X., Song, L., Zhang, Z., Pan, L., Fu, J., Elhamid, M. A. A., Soaud, S. A., et al. (2024) · Functional & Integrative Genomics · doi:10.1007/s10142-024-01301-6 · Cited by 6 · see citing works
Comprehensive Two‐Dimensional Gas Chromatography Combined with Mass Spectrometry
Tranchida, P. Q., Mondello, L., Poynter, S. D. H., & Shellie, R. A. (2011) · doi:10.1002/9781118003466.ch6 · Cited by 6 · see citing works
Tian, D., Qin, X., Kong, L., Ye, L., Han, X. H., Zhang, J., Hu, B., Wu, L., Guan, J., Li, J., et al. (2025) · Chemical Engineering Science · doi:10.1016/j.ces.2025.121594 · Cited by 5 · see citing works
Stan, M., Lung, I., Opriș, O., & Soran, M.-L. (2014) · Journal of Planar Chromatography – Modern TLC · doi:10.1556/jpc.27.2014.1.6 · Cited by 5 · see citing works
Compositional characteristics of the essential oil from the aerial parts of Artemisia sieberi Besser
Azarnivand, H., & Chahouki, M. A. Z. (2011) · Vegetos · Cited by 5 · see citing works
Zanousi, M. B. P., Aberoom, P., Azar, & Raeesi, M. (2012) · Journal of Medicinal Plants Research · doi:10.5897/jmpr12.271 · Cited by 5 · see citing works
Pan-metabolomics and its applications
Bao, L., & Liu, X. (2020) · Elsevier eBooks · doi:10.1016/b978-0-12-817076-2.00020-2 · Cited by 3 · see citing works
Liu, M., Su, Y., & Guo, Y. (2021) · Journal of Chromatographic Science · doi:10.1093/chromsci/bmab143 · Cited by 3 · see citing works
Wan, L., Huang, Q., Ji, X., Song, L., Zhang, Z., Pan, L., Fu, J., Elbaiomy, R. G., Eldomiaty, A. S., Rather, S. A., et al. (2023) · Functional & Integrative Genomics · doi:10.1007/s10142-023-01067-3 · Cited by 3 · see citing works
Gang, F., Lin, Z., Xian-rong, L., Zhang, W., & Zhang, Y. (2010) · World Science and Technology · doi:10.1016/s1876-3553(11)60033-1 · Cited by 2 · see citing works
Xu, W., Faping, B., Wang, M., Li, Y., Zong, X., Zhang, X., Fei, Y., Shi, Y. W., & Qin, K. (2026) · Industrial Crops and Products · doi:10.1016/j.indcrop.2026.123068 · Cited by 1 · see citing works
Mateus, E. P., da Silva, M. G., Ribeiro, A. B., & Marriott, P. J. (2015) · Springer eBooks · doi:10.1007/978-3-319-20179-5_22 · Cited by 1 · see citing works
최윤경, & 하병조 (2014) · Daehan miyong hakoeji · doi:10.15810/jic.2014.10.2.006 · Cited by 1 · see citing works
Plant-based Essential Oils in the Management of Dengue Vector, Aedesaegypti sp.
Das, T., & Subaharan, K. (2017) · LS International Journal of Life Sciences · doi:10.5958/2319-1198.2017.00007.0 · Cited by 1 · see citing works
Paladini, M. V. (2012) · Americanae (AECID Library)
Pharmacological evaluation of Atremisia annua for Antinociceptive Activity in rats
Abid, M. E. A., Anupam, K., Khan, N. A., Islam, G., & Gahlot, K. (2013)
Current literature in mass spectrometry
(2008) · Journal of Mass Spectrometry · doi:10.1002/jms.1298
Cserháti, T. (2009) · Springer eBooks · doi:10.1007/978-3-642-01656-1_3
梁, 鑫., 董, 军., 李, 伟., 刘, 艳., 王, 超., 刘, 艳., & 张, 秀. (2009) · Scientia Sinica Chimica · doi:10.1360/zb2009-39-8-678
Mohammed, S., Dekabo, A., & Hailu, T. (2022) · Figshare · doi:10.6084/m9.figshare.19166845
- Authors
- Ma, C., Wang, H., Lu, X., Li, H., Liu, B., & Xu, G.
- Affiliations
- Dalian Institute of Chemical Physics (CN)
- Chinese Academy of Sciences (CN)
- Corresponding author
- Liu, Benye
- Xu, Guowang
- Venue
- Journal of Chromatography A
- Publisher
- Elsevier BV
- Published
- 2007-05
- Volume
- 1150
- Issue
- 1-2
- Pages
- 50-53
- ISSN
- 0021-9673 (ISSN-L)
- OpenAlex
- W2001477207
- Cited by
- 80
- References
- 13
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 3 · 2023: 5 · 2022: 3 · 2021: 4 · 2020: 3 · 2019: 1 · 2018: 4 · 2017: 4 · 2016: 1 · 2015: 3 · 2014: 7 · 2013: 3 · 2012: 11
- FWCI
- 9.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Chromatography A (publishedVersion)
- PubMed (publishedVersion)
- Dalian Institute of Chemical Physics, CAS Institutional Repository (submittedVersion)
- Institute of Botany, CAS Institutional Repository (submittedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant chemical constituents analysis
- Health Sciences › Medicine › Complementary and alternative medicine › Traditional Chinese Medicine Analysis
- Keywords
- Artemisia annua, essential oils, essential oil composition, terpenes, artemisinic acid, chemical fingerprinting
- MeSH terms
- Chromatography, Gas, Oils, Volatile, Plant Oils, Mass Spectrometry, Reproducibility of Results, Molecular Structure, Artemisia annua
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