Subcritical reactive extraction of shogaol and gingerol: effect of time and temperature

Nisa Q. A. K., . and Purwantisari S., . and Nyamiati R. D., . and Yulianto M. E., . and Hartati I., . Subcritical reactive extraction of shogaol and gingerol: effect of time and temperature. pp. 857-863. ISSN 22317546

Gingerol and shogaol are two bioactive compounds of ginger which exhibit several positive effects on human health. The conventional method for shogaol preparation is considered ineffective because it causes losses to the environmental system and the efficiency of the process is low. Reactive extraction with subcritical water is a method that is considered environmentally friendly for the separation of slightly polar components without using organic solvents. The advantage of the reactive extraction process with subcritical water is that it does not require a catalyst because the process is able to form hydronium ions which can act as a catalyst to convert shogaol into gingerol. The effect of time and temperature on the yields of subcritical water reactive extraction of gingerol and shogaol were investigated in the present work. Experiments were carried out at a fixed pressure of 2 bar and a varied temperature of reactive extraction from 130 to 140C. Ginger and shogaol contents were analysed from the samples every 10 min. The chemical profiling of the resulting ginger extracts was performed using HPLC-MS. Results showed that the best subcritical water process was at 2 bar 130C and 20 min; shogaol concentration increased to 15.345 and gingerol to 5.113. For the reactive extraction time of longer than 20 min the shogaol concentration of the extract decreased. When temperature was above 120C and water hydrogen bonds weakened thus resulting in high amounts of ionisation products of subcritical water.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/29%20(04)%202022/12%20-...

Abstract

Gingerol and shogaol are two bioactive compounds of ginger which exhibit several positive effects on human health. The conventional method for shogaol preparation is considered ineffective because it causes losses to the environmental system and the efficiency of the process is low. Reactive extraction with subcritical water is a method that is considered environmentally friendly for the separation of slightly polar components without using organic solvents. The advantage of the reactive extraction process with subcritical water is that it does not require a catalyst because the process is able to form hydronium ions which can act as a catalyst to convert shogaol into gingerol. The effect of time and temperature on the yields of subcritical water reactive extraction of gingerol and shogaol were investigated in the present work. Experiments were carried out at a fixed pressure of 2 bar and a varied temperature of reactive extraction from 130 to 140C. Ginger and shogaol contents were analysed from the samples every 10 min. The chemical profiling of the resulting ginger extracts was performed using HPLC-MS. Results showed that the best subcritical water process was at 2 bar 130C and 20 min; shogaol concentration increased to 15.345 and gingerol to 5.113. For the reactive extraction time of longer than 20 min the shogaol concentration of the extract decreased. When temperature was above 120C and water hydrogen bonds weakened thus resulting in high amounts of ionisation products of subcritical water.

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Item Type:	Article
AGROVOC Term:	Ginger
AGROVOC Term:	Zingiberaceae
AGROVOC Term:	Zingiber officinale
AGROVOC Term:	Experiments
AGROVOC Term:	profiling
AGROVOC Term:	Extraction in chemical analysis
AGROVOC Term:	Time
AGROVOC Term:	Temperature
AGROVOC Term:	Ionization
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10826

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