蓝莓新鲜度指示剂研究

Blueberry Freshness Indicator

目的研究一种以蓝莓花青素为原料制作的蓝莓新鲜度指示剂,并应用于蓝莓包装,用以指示蓝莓果实在运输贮藏过程中新鲜度的变化情况。方法以新鲜度指示剂在蓝莓贮藏期间的色差值作为考查指标,对影响色差值的因素进行研究。首先通过单因素试验研究果皮浓度、滤液pH值和滤纸浸泡时间对指示剂色差值的影响,然后利用正交试验法优化最佳工艺条件。结果由正交试验分析结果得出蓝莓新鲜度指示剂最佳工艺条件,果皮质量浓度为4 g/(100 m L)、滤液pH值为12、滤纸浸泡时间为1.5 min,该条件下新鲜度指示剂的色差值为54.69。结论通过正交试验法获取最优制作工艺的蓝莓新鲜度指示剂,该指示剂具有明显的颜色界限,是一种实用的蓝莓包装标签。

The work aims to study a blueberry freshness indicator made of blueberry anthocyanins and apply it in blueberry packaging to indicate the freshness change of blueberry during transportation and storage. The color difference of freshness indicator during the storage of blueberry was taken as the test index to study the factors affecting the color difference. First of all, the influence of the peel concentration, filtrate pH value and filter paper dipping time on the indicator color difference was studied by single factor experiment. Then, the optimum technological conditions were optimized by orthogonal test. The results of orthogonal test showed that the optimum technological conditions of blueberry freshness indicator were as follows： the peel mass concentration was 4 g/（100 mL）, the pH value of filtrate was 12, and the dipping time of filter paper was 1.5 min. The color difference of freshness indicator under these conditions was 54.69. The blueberry freshness indicator whose optimal production process is obtained in the orthogonal test method has clear color boundaries, and it is a practical blueberry packaging label.