Comparison and optimization of two extract methods (atmospheric pressure and pressurized pretreatment) of pectin from Zanthoxylum bungeanum Maxim. seeds by response surface methodology

ABSTRACT

In this study, the extract methods of pectin from Zanthoxylum bungeanum Maxim. seeds under atmospheric pressure and pressurized pretreatment were investigated and compared. Response surface methodology was applied to optimize the extraction conditions for obtaining the maximum yield of pectin. The optimum extraction conditions under atmospheric pressure were as follows: pH 2.5, 84.8°C, 81.0 min, and liquid-to-solid ratio 14.2:1 (ml/g). The optimum extraction conditions under pressurized pretreatment were as follows: pH 6.1, 117.7°C, and 95.4 min. In contrast, the optimal extraction yield under pressurized pretreatment was 76.52% above that of extraction under atmospheric pressure.

KEYWORDS:

• Atmospheric pressure
• pectin
• pressurized pretreatment
• response surface methodology
• Zanthoxylum bungeanum Maxim.

Acknowledgement

We gratefully wish to thank Z. bungeanum Maxim. Production Office of Jinyang, Sichuan Province for providing raw materials used in this work.

Funding

This work was financially supported by the Science and Technology Department of Sichuan Province (Grant No. 2016JY0118).

Additional information

Funding

This work was financially supported by the Science and Technology Department of Sichuan Province (Grant No. 2016JY0118).