Comparison of volatile components from Maca extracted by headspace solid phase microextraction and steam distillation was written by Zhang, Pengyun;Li, Rong;Li, Haoyang;Chen, Lisi;Zhang, Feng. And the article was included in Shipin Keji in 2018.Category: esters-buliding-blocks The following contents are mentioned in the article:
Objective: To compare headspace solid-phase microextraction (HS-SPME) and steam distillation (SD) in the extraction of volatile components composition and differences from Maca in Lijiang, Yunnan. Methods: GC-MS and GC-QTOF-MS were used to detect and analyze the extracts of the two methods resp. Result: A total of 70 components were detected in the HS-SPME extract, and 54 components were identified, accounting for 95.16% of the total peak area of the volatile substances, mainly including nitriles (61.49%), esters (15.25%), aldehydes (9.86%) and pyrazine (1.27%). A total of 74 components were detected in the SD extract, and 39 components were identified, accounting for 97.40% of the total peak area of volatile substances, mainly including nitriles (90.33%), aldehydes (5.04%) and esters (1.62%), of which there were 16 common components, and the highest content of all components are phenylacetonitrile. Conclusion: There were certain differences in the composition and content of the volatile components extracted from Maca by the two methods, in which the extraction effect of HS-SPME was relatively good, which could be applied to the rapid detection of volatile components in Maca. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Category: esters-buliding-blocks).
Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics