Optimization of Ultrasonic-Assisted Extraction of Pectin from Pomegranate Pomace by Orthogonal Experiments

doi:10.14088/j.cnki.issn0439-8114.2018.07.023

Abstract

Abstract: Ultrasonic-assisted extraction of acid-solution and alcohol precipitation was applied to extract pectin from pomegranate（Punica granatum L.） pomacel. The optimum conditions of ultrasonic-assisted extraction of pectin from pomegranate pomacel were determined and provided basis for further exploitation of by-products in pomegranate processing. Based on single factor test,orthogonal experiments were designed to optimize the influences of extracting temperature,extracting time,the ratio of solid to liquid and water to acid on the pectin yield. Results showed that at the ultrasonic frequency of 45 GHz,extracting temperature of 55 ℃, an extraction time of 75 min,water-acid ratio of 6∶1（mL∶mL）,the add of sulphurous acid of 2 mol/L,solid-liquid ratio of 1∶50（g∶mL）,the yield of pectin was 34.41%. By the study of ultrasonic-assisted extraction of pectin from pomegranate pomace,the extraction rate was high and pomegranate pomace had very high value of development and utilization.

Key words: pomegranate（Punica granatum L.） pomace, pectin, ultrasonic-assisted extraction

CLC Number:

TS255.1

MENG Fan-lei, SUN Le-le, ZHANG Li-hua. Optimization of Ultrasonic-Assisted Extraction of Pectin from Pomegranate Pomace by Orthogonal Experiments[J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(7): 100-103.

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