Abstract
The excessive and continuously growing interest in the simultaneous determination of poppy alkaloids imposes the development and optimization of convenient high-throughput methods for the assessment of the qualitative and quantitative profile of alkaloids in poppy straw. Systematic optimization of two chromatographic methods (gas chromatography (GC)/flame ionization detector (FID)/mass spectrometry (MS) and reversed-phase (RP)–high-performance liquid chromatography (HPLC)/diode array detector (DAD)) for the separation of alkaloids from Papaver somniferum L. (Papaveraceae) was carried out. The effects of various conditions on the predefined chromatographic descriptors were investigated using chemometrics. A full factorial linear design of experiments for determining the relationship between chromatographic conditions and the retention behavior of the analytes was used. Central composite circumscribed design was utilized for the final method optimization. By conducting the optimization of the methods in very rational manner, a great deal of excessive and unproductive laboratory research work was avoided. The developed chromatographic methods were validated and compared in line with the resolving power, sensitivity, accuracy, speed, cost, ecological aspects, and compatibility with the poppy straw extraction procedure. The separation of the opium alkaloids using the GC/FID/MS method was achieved within 10 min, avoiding any derivatization step. This method has a stronger resolving power, shorter analysis time, better cost/effectiveness factor than the RP-HPLC/DAD method and is in line with the “green trend” of the analysis. The RP-HPLC/DAD method on the other hand displayed better sensitivity for all tested alkaloids. The proposed methods provide both fast screening and an accurate content assessment of the six alkaloids in the poppy samples obtained from the selection program of Papaver strains.
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Abbreviations
- CCCD:
-
Central composite circumscribed design
- CD:
-
Codeine
- DAD:
-
Diode array detector
- DoE:
-
Design of experiments
- DSC:
-
Differential scanning calorimetry
- FID:
-
Flame ionization detector
- FTIR:
-
Fourier transform infrared spectroscopy
- GC:
-
Gas chromatography
- HPLC:
-
High-performance liquid chromatography
- ICH:
-
International conference on harmonization
- MO:
-
Morphine
- MS:
-
Mass spectrometry
- NIST:
-
National institute of standardization and technology
- NS:
-
Noscapine
- OR:
-
Oripavine
- RP:
-
Reverse-phase liquid chromatography
- Rs:
-
Resolution
- RSM:
-
Response Surface Methodology
- PV:
-
Papaverine
- TB:
-
Thebaine
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A part of this study was financially supported by ALKALOID A.D. Skopje.
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Published in the special issue Euroanalysis XVI (The European Conference on Analytical Chemistry) with guest editor Slavica Ražić.
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Acevska, J., Stefkov, G., Petkovska, R. et al. Chemometric approach for development, optimization, and validation of different chromatographic methods for separation of opium alkaloids. Anal Bioanal Chem 403, 1117–1129 (2012). https://doi.org/10.1007/s00216-012-5716-1
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DOI: https://doi.org/10.1007/s00216-012-5716-1