Spray drying of indigo fruit anthocyanins powder prepared by the process
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摘要: 以蓝靛果为原料,提取其中的花色苷,再采用喷雾干燥法制备花色苷粉末。以花色苷粉末含水量、降解率为指标,进料浓度、进料流量和进风温度为影响因素进行单因素干燥工艺研究,并在单因素基础上,以含水量为指标进行正交实验研究,得出最佳工艺条件。在此基础上,以花色苷粉末含水量、花色苷降解率、抗氧化性为指标,对喷雾干燥和真空冷冻干燥工艺进行对比实验研究。结果表明,喷雾干燥最佳工艺条件为:进风温度160℃、进料流量18mL/min、进料浓度18%,在该条件下花色苷粉末中花色苷降解率为15.21%、含水量为3.98%、ABTS+自由基清除率为49%。以上结果与真空冷冻干燥相比,花色苷粉末降解率相差4.98%,含水量相差1.23%,ABTS+自由基清除率相差21%。因此,喷雾干燥法用于花色苷粉末制备工艺是可行的。Abstract: Edulis as raw material, prepared by spray drying anthocyanin powder. Anthocyanin powder in water content, degradation rate indicators, feed concentration, feed flow rate and inlet air temperature for the study of the single factor effected on drying process. And the single factor, based on a moisture content of indicators orthogonal experiment, optimum conditions. And on this basis to anthocyanin powder moisture content, the degradation rate of anthocyanins, antioxidant activity as an indicator study compared anthocyanins spray and vacuum freeze-drying process. Results showed that the best process conditions for spray drying were as followed:inlet air temperature 160℃, feed flow rate 18mL/min, feed concentration of 18%, under this condition, the powder anthocyanin degradation rate of 15.21% anthocyanins, a water content of 3.98%, ABTS+radical scavenging rate of 49%. Vacuum freeze-drying process similar effect, wherein the degradation rate of anthocyanin powder would plug 4.98%, moisture content difference 1.23%, ABTS+radical scavenging difference21%. Therefore, the spray drying method being used anthocyanin powder preparation technology was feasible.
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Keywords:
- anthocyanins /
- spray drying /
- antioxidant /
- dry
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