摘要
以1-(2-吡啶偶氮)-2-萘酚(1-(2-pyridylazo)-2-naphthol,PAN)合铜(Ⅱ)络合物(Cu-PAN)为H_(2)S指示剂,壳聚糖(chitosan,CS)/聚乙烯醇(polyvinyl alcohol,PVA)为膜基材料,石墨烯为增敏材料,采用流延法制备比色复合薄膜(Cu-PAN@G-CS/PVA),通过指示剂置换法,实现对虾肉中H_(2)S的检测。利用扫描电子显微镜和傅里叶红外光谱考察Cu-PAN@G-CS/PVA的形貌和官能团特征,通过紫外-可见吸收光谱考察鲜度膜对H_(2)S的响应性能。结果表明,随H_(2)S质量浓度增加,Cu-PAN@G-CS/PVA薄膜由紫红色变成黄色。利用Cu-PAN@G-CS/PVA薄膜监测明虾(Penaeus chinensis)在4℃和25℃贮藏的鲜度变化,色差变化值与总挥发性盐基氮含量有很好的相关性,可准确、快速指示虾肉的新鲜度,为水产品智能包装的开发提供参考。
A colorimetric composite film(Cu-PAN@G-CS/PVA)for the detection of H_(2)S in shrimp meat by indicator displacement was prepared by tape casting method using copper(II)-1-(2-pyridylazo)-2-naphthol complex(Cu-PAN)as a H_(2)S-sensitive material,chitosan(CS)combined with polyvinyl alcohol(PVA)as a film-forming material and graphene as a sensitizing material.The morphology and functional groups of Cu-PAN@G-CS/PVA were investigated by scanning electron microscopy(SEM)and Fourier transform infrared spectroscopy(FTIR),and the sensing performance to H_(2)S was examined by ultraviolet-visible(UV-vis)absorption spectroscopy.Experimental results showed that the color of the Cu-PAN@G-CS/PVA film changed from purplish red to yellow with increasing H_(2)S concentration.This film was used to monitor the freshness of Penaeus chinensis stored at 4 or 25℃.It was shown that the trend of the color difference value(ΔE)of the Cu-PAN@G-CS/PVA film had a good correlation with the total volatile basic nitrogen(TVB-N)content of the sample.Therefore,the Cu-PAN@G-CS/PVA film could accurately and rapidly indicate the freshness of P.chinensis,which may provide a reference for the development of intelligent packaging of aquatic products.
作者
郭亚平
陈琳珉
陈全胜
陈晓梅
GUO Yaping;CHEN Linmin;CHEN Quansheng;CHEN Xiaomei(College of Ocean Food and Biological Engineering,Jimei University,Xiamen 361021,China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2023年第8期330-336,共7页
Food Science
基金
福建省自然科学基金面上项目(2020J01677)
国家自然科学基金面上项目(32072299)。