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高压加工对冷藏期间胡卜汁品质的影响
Chiu-Chu Hwang1, Hung-I Chien1, Yi-Chen Lee1
1Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung 811213, Taiwan.
Foods (Basel, Switzerland)
|August 26, 2023
概括
高压加工 (HPP) 有效地消除了胡卜汁中的微生物,保持质量和延长保质期. 结合白化,HPP在储存期间显著提高了微生物安全性和化学稳定性.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 食品化学 食品化学
背景情况:
- 由于储存期间的微生物生长和化学变化,胡卜汁的质量迅速恶化.
- 传统的保存方法,如白化,在保持果汁质量方面存在局限性.
- 需要新的加工技术来提高最低加工果汁的保质期和安全性.
研究的目的:
- 评估高压加工 (HPP),白化及其组合对胡卜汁质量的影响.
- 在冷藏储存期间评估微生物,化学,色彩和抗氧化物质的变化.
- 为了确定HPP在延长胡卜汁的保质期方面的有效性.
主要方法:
- 胡卜汁样品经过白化 (85°C,60秒),HPP (600 MPa,3分,20°C) 或两者的组合处理.
- 样品在4°C下保存了15天.
- 分析了微生物学计数 (TPC,大肠杆菌,沙门氏菌),pH值,可溶性固体总量,可定位酸度,颜色 (亨特L,a,b),棕色度,含量总量,DPPH激素清除活性和β-胡卜素含量.
主要成果:
- HPP和漂白/HPP处理使得胡卜汁在微生物安全性上,在整个储存过程中无法检测到TPC,大肠杆菌和沙门氏菌.
- 单纯的白化会在9天内延迟微生物的生长,但不会阻止微生物的生长超过可接受的限度.
- 与对照组和漂白组相比,HPP处理显著抑制了pH值,总溶性固体和颜色值的下降,并减缓了酸度和色的增加.
- 虽然HPP样本中的含量和抗氧化活性较低,但在储存结束时,β-胡卜素含量仍然较高.
结论:
- 高压加工是一种高效的方法,可以确保胡卜汁的微生物安全性.
- 在冷藏储存期间,HPP显著提高了胡卜汁的化学和颜色稳定性.
- 带有或没有先前色的HPP,通过防止微生物破坏和质量降低,延长胡卜汁的保质期.
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