Rapid Identification of American Ginseng Originated from Varied Places Based on Heracles Ultra-fast Gas Phase Electronic Nose
Notice bibliographique
Résumé
Objective: Heracles ultra-fast gas phase electronic nose was applied to establish a quick and effective differentiation method for American ginseng originated from varied places on the basis of different smell. Methods: Heracles ultra-fast gas phase electronic nose was used to analyze the smell of American ginseng originated from varied places and acquired chromatographic information of smell of sample American ginseng. The chromatographic peaks with strong separation intensity and discrimination ability were screened. Based on Kovats retention index and Arochembase database, the main odorant compounds of American ginseng from different producing areas were characterized. According to the relative odor activity value (ROAV), the contribution degree of the main difference compounds to the odor of American ginseng was analyzed by the odor threshold and relative content of the main difference compounds. PCA and DFA stoichiometry models were used for analysis. Results: Thirteen major differential compounds including propanaldehyde, n-valyl aldehyde and n-hexanal were screened out from ginseng of different origin by Heracles ultra-fast gas-phase electronic nose. Through the ROAV analysis of the main difference compounds, it was determined that n-hexal, propionic aldehyde, dodecal, n-valyl aldehyde, 2,3,5-trimethylpyrazine, methyl butyrate, 2-heptanol were the odor substances that contributed more to the odor of American ginseng. Among them, n-hexal was the key odor compounds that contributed the most to the odor of American ginseng. The contents of n-hexal, n-valental, 2,3,5-trimethylpyrazine and 2-heptanol were the highest in American ginseng from American . The contents of propionic aldehyde and methyl butyrate were the highest in American ginseng from Canadian. The content of dodecal was the highest in American ginseng from Jilin . PCA and DFA stoichiometric models were established. The recognition index of PCA model was 88. The cumulative discrimination index of DFA model was 100%. It was indicated that both PCA and DFA models could distinguish the odors of American ginseng from different producing areas, which could identify and analyze the odors of American ginseng samples. Conclusion: Heracles ultra-fast gas-phase electronic nose can quickly and effectively distinguish ginseng from different origin. This provides a new scientific basis for tracing the origin of ginseng.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,002 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,001 |
| Science ouverte | 0,002 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».