花色苷在不同环境因素和食品基质中的降解规律
Degradation rules of anthocyanin in different environmental factors and food matrices
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摘要:为探明不同环境因素和食品基质条件对花色苷的降解规律,研究了不同温度(4~100 ℃)、光照条件(避光、日光和紫外光)、冻融循环(5次)、蔗糖添加量(0~20%)和NaCl添加量(0~5.0%)对花色苷保留率的影响,并构建了降解动力学模型。结果表明:温度从4 ℃升高到100 ℃时,花色苷10 h保留率从88.19%降低至28.10%,其半衰期( t 1/2)从55.0 h降低至5.9 h( P<0.05);与避光条件相比,紫外光条件下的花色苷10 h保留率和 t 1/2均达到最低值(84.41%和43.0 h);经过5次冻融循环后,花色苷120 h保留率降低至85.21%,此时的 t 1/2为612.6 h;在80 ℃稳定性加速实验中,当蔗糖添加量为10%时,花色苷10 h保留率和 t 1/2均达到最高值(60.17%和13.7 h),而当NaCl添加量为5%时,花色苷10 h保留率和 t 1/2均达到最高值(54.63%和11.3 h)。花色苷的贮藏和加工应尽量避免高温、紫外光和冻融循环,并可添加适量的蔗糖和NaCl以增强其稳定性。Abstract:To explore the degradation rule of anthocyanin subjected with different environmental factors and food matrices, the effects of different temperatures (4~100 ℃), illumination conditions (avoiding light, sunlight, and ultraviolet), freeze-thaw cycles (5 times), sucrose additions (0~20%) and NaCl additions (0~5.0%) on the anthocyanin retention were investigated, and their degradation kinetic models were further established. Results showed that, with the temperature increasing from 4 ℃ to 100 ℃, anthocyanin retention of 10 h decreased significantly from 88.19% to 28.10%, and their half-life time ( t 1/2) decreased from 55.0 h to 5.9 h( P<0.05). Compared with avoiding light, both anthocyanin retention of 10 h and t 1/2under ultraviolet were the lowest (84.41% and 43.0 h). After five freeze-thaw cycles, anthocyanin retention of 120 h was reduced to 85.21% with the corresponding t 1/2of 612.6 h. During 80 ℃ of stability acceleration experiment, both anthocyanin retention of 10 h and their t 1/2reached the highest value (60.17% and 13.7 h) with sucrose addition of 10%, and the above values also reached the highest value (54.63% and 11.3 h) with NaCl addition of 5%. The storage and processing of anthocyanins should avoid high temperature, ultraviolet and freeze-thaw cycles as much as possible, and appropriate amount of sucrose and NaCl could be added to enhance the stability of antholyanins.
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Key words:
- anthocyanin/
- environmental factor/
- food matrix/
- stability/
- degradation kinetic
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