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Citation: LI Ning, XIAO Ting, ZHANG Qian, CHEN Xiao-Mei, CHEN Xi. A Color Indicator for Fish Freshness Based on Meldrum's Activated Furan[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(12): 1642-1649. doi: 10.19756/j.issn.0253-3820.201297 shu

A Color Indicator for Fish Freshness Based on Meldrum's Activated Furan

LI Ning ¹ ,
XIAO Ting ¹ ,
ZHANG Qian ¹ ,
CHEN Xiao-Mei ^1,, ,
CHEN Xi ²

1.
College of Food and Biological Engineering, Jimei University, Xiamen 361021, China;
2.
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Corresponding author: CHEN Xiao-Mei, xmchen@jmu.edu.cn
Received Date: 24 May 2020
Revised Date: 30 September 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21675062) and the Top Young Innovative Talents Project in Fujian Province, China.

pH-sensitive material is commonly used as traditional freshness indicators, which is greatly suffered by environmental factors and easy to cause false positive results. To solve this problem, a freshness indicator using Meldrum's activated furan (MAF) as volatile amine-sensitive material and polyvinyl chloride (PVC) as supporting film was proposed in this work. MAF/PVC films were prepared by spin coating method, and the sensing properties of the films were investigated with NH₃ as the model target. Experimental results showed that the film prepared with 15% mass content of MAF at 2000 r/min of coating speed revealed the best sensing property towards NH₃. Using MAF/PVC film as the freshness indicator for fish, the lightness (L), redness (a) and yellowness (b) values of films were recorded. The color difference value (ΔE) was calculated according to the L, a, b values of the MAF/PVC films. At the same time, the TVB-N contents of fish samples were determined. Results showed that the trend of the ΔE value changes of the MAF/PVC film had a good correlation with the totla volatile basic nitrogen (TVB-N) content of the sample. Therefore, the freshness indicator based on MAF/PVC film could accurately and rapidly indicate the freshness of fish, thus showing a broad application prospect in detection of freshness of aquatic products.
- Freshness indicator,
- Fish,
- Meldrum's activated furan
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