为了研究桑葚果浆加工中花色苷和色泽的热降解规律,测定了不同温度(75、80、85、90℃)下桑葚果浆花色苷含量和色泽值的影响,并建立了花色苷与色泽值的相关性。结果表明:桑葚果浆中花色苷的热降解符合一级动力学反应,L*、a*和TCD*值的热降解符合联合动力学反应,b*值的热降解符合零级动力学反应。花色苷的降解与L*、a*和TCD*值正相关,与b*值负相关。

Thermal degradation kinetics of anthocyanin and its visual colour in mulberry puree during heat processing was investigated and a relationship between visual colour and anthocyanin was established. Results showed that the breakdown of anthocyanin followed a first-order reaction,L*,a*and TCD*values followed a combined kinetics model. The degradation of anthocyanins showed positive correlation with L*,a*and TCD*values and negative correlation with b*value.