RhB@MOF-5 Composite Film As a Fluorescence Sensor for Detection of Chilled Pork Freshness

Overview

Journal Biosensors (Basel)

Specialty Biotechnology

Date 2022 Jul 27

PMID 35884347

Authors

Jingyi Li

Ning Zhang

Xin Yang

Xinting Yang

Zengli Wang

Huan Liu

Affiliations

Soon will be listed here.

Abstract

This study presents a novel composite thin film based on rhodamine B encapsulated into MOF-5 (Metal Organic Frameworks) as a fluorescence sensor for the real-time detection of the freshness of chilled pork. The composite film can adsorb and respond to the volatile amines produced by the quality deterioration of pork during storage at 4 °C, with the fluorescence intensity of RhB decreasing over time. The quantitative model used for predicting the freshness indicator (total volatile base nitrogen) of pork was built using the fluorescence spectra (excited at 340 nm) of the RhB@MOF-5 composite film combined with the partial least squares (PLS) algorithm, providing R and R values of 0.908 and 0.821 and RMSEC (root mean square error of calibration) and RMSEP (root mean square error of prediction) values of 3.435 mg/100 g and 3.647 mg/100 g, respectively. The qualitative model established by the partial least squares discriminant analysis (PLS-DA) algorithm was able to accurately classify pork samples as fresh, acceptable or spoiled, and the accuracy was 86.67%.

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