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Highly Sensitive Fluorescence Sensor for Carrageenan from a Composite Methylcellulose/Polyacrylate Membrane
- Source :
- Sensors (Basel, Switzerland), Sensors, Vol 20, Iss 5043, p 5043 (2020)
- Publication Year :
- 2020
- Publisher :
- MDPI, 2020.
-
Abstract
- Carrageenans are linear sulphated polysaccharides that are commonly added into confectionery products but may exert a detrimental effect to human health. A new and simpler way of carrageenan determination based on an optical sensor utilizing a methylcellulose/poly(n-butyl acrylate) (Mc/PnBA) composite membrane with immobilized methylene blue (MB) was developed. The hydrophilic Mc polymer membrane was successfully modified with a more hydrophobic acrylic polymer. This was to produce an insoluble membrane at room temperature where MB reagent could be immobilized to build an optical sensor for carrageenan analysis. The fluorescence intensity of MB in the composite membrane was found to be proportional to the carrageenan concentrations in a linear manner (1.0ā20.0 mg Lā1, R2 = 0.992) and with a detection limit at 0.4 mg Lā1. Recovery of spiked carrageenan into commercial fruit juice products showed percentage recoveries between 90% and 102%. The optical sensor has the advantages of improved sensitivity and better selectivity to carrageenan when compared to other types of hydrocolloids. Its sensitivity was comparable to most sophisticated techniques for carageenan analysis but better than other types of optical sensors. Thus, this sensor provides a simple, rapid, and sensitive means for carageenan analysis.
- Subjects :
- Letter
02 engineering and technology
010402 general chemistry
lcsh:Chemical technology
01 natural sciences
Biochemistry
Analytical Chemistry
fluorescence sensor
chemistry.chemical_compound
lcsh:TP1-1185
Electrical and Electronic Engineering
Instrumentation
chemistry.chemical_classification
Detection limit
Acrylate
Chromatography
Polymer
polymer blend
021001 nanoscience & nanotechnology
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Carrageenan
Membrane
chemistry
Reagent
carrageenan
methylene blue
Polymer blend
0210 nano-technology
Methylene blue
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 20
- Issue :
- 18
- Database :
- OpenAIRE
- Journal :
- Sensors (Basel, Switzerland)
- Accession number :
- edsair.doi.dedup.....362a9aa3c50429140a3aedc603d578a3