Optimization of orange peel pectin extraction process assisted by ammonium oxalate
Using orange peel as raw material,the pectin was extracted by ultrasonic assisted ammonium oxalate method,and the effects of ammonium oxalate concentration,liquid-solid ra-tio,ultrasonic time,and extraction temperature on pectin extraction rate were studied by single factor and orthogonal experiment.The results showed that the optimal extraction conditions were as follows:ammonium oxalate concentration 0.75％,solid-liquid ratio 1∶21(g/mL),ultra-sonic treatment time 50 min,extraction temperature 85℃.Under these conditions,the extrac-tion yield of pectin reached 21.42％.This study provided theoretical basis for the industrial pro-duction of orange peel pectin extraction.
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