Fabrication Of Butterfly Pea Flower Anthocyanin-Incorporated Colorimetric Indicator Film Based On Gelatin/Pectin For Monitoring Fish Freshness

IF 4.6 Q1 CHEMISTRY, APPLIED
Gopika Puthussery Narayanan, Preetha Radhakrishnan, Pooja Baiju, Asmath Mubeena S
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引用次数: 0

Abstract

Novel visual intelligent pH-indicator film was prepared from the eggshell membrane- gelatin, pectin, and anthocyanin pigment from butterfly pea flower (BP) (Clitoria ternatea). It was used as a real-time pH indicator for predicting food freshness. Eggshells are useful biowaste, gelatin has been extracted from the eggshell membrane and was used for fabricating the film. The Anthocyanin content of BP extract was 198.3 mg g−1. The film's surface morphology and chemical nature were estimated using a Scanning electron microscope, Fourier transform infrared spectroscopy, and X-ray diffraction technique. The film was pH responsive and exhibited color variation ranging from shades of red, purple, blue, green, and yellow at different pH (1-13). The applicability of the developed pH- indicator film was studied on fresh Tilapia fish by monitoring its deterioration for a specific time period. The film showed a visible color change after seven days of storage at 4ºC from dark blue, bluish-grey to olive, and deep green. Change in the total volatile basic nitrogen (TVB-N) content and pH change had an effect on the color response of the film. The findings demonstrated that the fabricated pH indicator film proved to be pH sensitive and could be used to monitor fish freshness.

基于明胶/果胶的蝶豌豆花花青素比色指示膜的制备及其对鱼类新鲜度的监测
以蝶豆花(Clitoria ternatea)为原料,利用蛋壳膜-明胶、果胶和花青素色素制备了一种新型的视觉智能ph指示膜。它被用作预测食品新鲜度的实时pH指标。蛋壳是一种有用的生物废弃物,从蛋壳膜中提取明胶制备了蛋壳膜。BP提取物花青素含量为198.3 mg g−1。利用扫描电子显微镜、傅里叶变换红外光谱和x射线衍射技术对膜的表面形貌和化学性质进行了估计。该膜对pH值有响应性,在不同pH值下呈现红色、紫色、蓝色、绿色和黄色等颜色变化(1-13)。通过对新鲜罗非鱼进行一定时间的变质监测,研究了所研制的pH指示膜在新鲜罗非鱼上的适用性。在4℃下保存7天后,薄膜的颜色发生了明显的变化,从深蓝色、蓝灰色到橄榄色和深绿色。总挥发性碱态氮(TVB-N)含量的变化和pH值的变化对膜的颜色响应有影响。结果表明,所制备的pH指示膜对pH值敏感,可用于鱼类新鲜度的监测。
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CiteScore
4.50
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