Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables
Freshness is one of the main factors affecting consumers’ purchase of food. The freshness indicator labels of packaged fresh green bell pepper (<i>Capsicum annuum</i> L.) and greengrocery (<i>Brassica chinensis</i> L.) were constructed, and pH-sensitive indicator labels based...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/12/18/3489 |
| _version_ | 1797580097584103424 |
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| author | Tianlin Feng Huizhi Chen Min Zhang |
| author_facet | Tianlin Feng Huizhi Chen Min Zhang |
| author_sort | Tianlin Feng |
| collection | DOAJ |
| description | Freshness is one of the main factors affecting consumers’ purchase of food. The freshness indicator labels of packaged fresh green bell pepper (<i>Capsicum annuum</i> L.) and greengrocery (<i>Brassica chinensis</i> L.) were constructed, and pH-sensitive indicator labels based on the dye of anthocyanin and the mixing dye of methyl red and bromothymol blue were prepared in this study. At the same time, the color, chlorophyll content and vitamin C content of vegetables were measured in order to explore the applicability of indicator labels in the cool chain transportation of vegetables. Compared with the nature dye, the chemical dye-type indicator labels are more sensitive to pH changes. The results showed that the mixed indicator intelligent label had the best indication effect, and the MB 2 (mixing 1 g/L methyl red and bromothymol blue solutions at a ratio of 3:2 with a concentration of 70 mL/L in indicator film solution) indicator label could effectively indicate the freshness changes in vegetables during storage. Meanwhile, the color changes of the MB 2-type indicator label were correlated with the colors change of the sample, changes in nutrients, and changes in CO<sub>2</sub> content inside the packaging. In addition, freshness detection models for green bell pepper and greengrocery by using color information of MB 2 intelligent labels were established. Hence, this pH-sensitive label can be applied as a promising intelligent packaging for non-destructively monitoring the freshness of respiratory and non-respiratory climacteric vegetables. |
| first_indexed | 2024-03-10T22:45:34Z |
| format | Article |
| id | doaj.art-a2401033375f4819a932b5a651d9cdb0 |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-10T22:45:34Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Foods |
| spelling | doaj.art-a2401033375f4819a932b5a651d9cdb02023-11-19T10:43:52ZengMDPI AGFoods2304-81582023-09-011218348910.3390/foods12183489Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of VegetablesTianlin Feng0Huizhi Chen1Min Zhang2State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, ChinaState Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, ChinaState Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, ChinaFreshness is one of the main factors affecting consumers’ purchase of food. The freshness indicator labels of packaged fresh green bell pepper (<i>Capsicum annuum</i> L.) and greengrocery (<i>Brassica chinensis</i> L.) were constructed, and pH-sensitive indicator labels based on the dye of anthocyanin and the mixing dye of methyl red and bromothymol blue were prepared in this study. At the same time, the color, chlorophyll content and vitamin C content of vegetables were measured in order to explore the applicability of indicator labels in the cool chain transportation of vegetables. Compared with the nature dye, the chemical dye-type indicator labels are more sensitive to pH changes. The results showed that the mixed indicator intelligent label had the best indication effect, and the MB 2 (mixing 1 g/L methyl red and bromothymol blue solutions at a ratio of 3:2 with a concentration of 70 mL/L in indicator film solution) indicator label could effectively indicate the freshness changes in vegetables during storage. Meanwhile, the color changes of the MB 2-type indicator label were correlated with the colors change of the sample, changes in nutrients, and changes in CO<sub>2</sub> content inside the packaging. In addition, freshness detection models for green bell pepper and greengrocery by using color information of MB 2 intelligent labels were established. Hence, this pH-sensitive label can be applied as a promising intelligent packaging for non-destructively monitoring the freshness of respiratory and non-respiratory climacteric vegetables.https://www.mdpi.com/2304-8158/12/18/3489intelligent labelcolor changeanthocyaninpH indicatorfreshness detection model |
| spellingShingle | Tianlin Feng Huizhi Chen Min Zhang Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables Foods intelligent label color change anthocyanin pH indicator freshness detection model |
| title | Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables |
| title_full | Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables |
| title_fullStr | Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables |
| title_full_unstemmed | Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables |
| title_short | Applicability and Freshness Control of pH-Sensitive Intelligent Label in Cool Chain Transportation of Vegetables |
| title_sort | applicability and freshness control of ph sensitive intelligent label in cool chain transportation of vegetables |
| topic | intelligent label color change anthocyanin pH indicator freshness detection model |
| url | https://www.mdpi.com/2304-8158/12/18/3489 |
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