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An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples

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dc.FundingDetailsUniversiti Sains Malaysia
dc.FundingDetailsThe authors are grateful to School of Chemical Sciences and Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, for providing the facilities used in this research. The author would also like to thank Universiti Sains Malaysia for the financial support under Academic Staff Training Scheme to carry out this research.
dc.contributor.affiliationsFaculty of Science and Technology
dc.contributor.affiliationsUniversiti Sains Malaysia (USM)
dc.contributor.affiliationsUniversiti Sains Islam Malaysia (USIM)
dc.contributor.affiliationsUniversiti Kebangsaan Malaysia (UKM)
dc.contributor.authorMd Muslim N.Z.en_US
dc.contributor.authorAhmad M.en_US
dc.contributor.authorHeng L.Y.en_US
dc.contributor.authorSaad B.en_US
dc.date.accessioned2024-05-28T08:31:24Z
dc.date.available2024-05-28T08:31:24Z
dc.date.issued2018
dc.description.abstractAn optical fiber chemical sensor for the determination of free glutamate in food samples was fabricated based on the immobilization of 0.1 M copper(II) nitrate trihydrate onto sol-gel glass powder which was then mixed with methyl cellulose to form a pellet. A distinctive colour change from light blue to dark blue was observed in the presence of glutamate in less than 1 min. The colour change was measured by reflectance spectrophotometer at 691 nm. A linear relationship between the reflectance intensity and glutamate concentration was observed in the range of 12.5 to 500 mM with a limit of detection of 10.6 mM. This method is also reproducible with a relative standard deviation of less than 5%, no effect on pH of the glutamate solution and a good recovery of above 80%. The sensor was used for the determination of glutamate in common food items such as soups and flavor enhancers. The results obtained from the fabricated sensor were found to be comparable with HPLC method.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.17576/jsm-2018-4704-08
dc.identifier.epage713
dc.identifier.issn1266039
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85047903378
dc.identifier.spage707
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85047903378&doi=10.17576%2fjsm-2018-4704-08&partnerID=40&md5=089bbf7feb0309c7aad2e81388f6e3f9
dc.identifier.urihttps://oarep.usim.edu.my/handle/123456789/8983
dc.identifier.volume47
dc.languageEnglish
dc.language.isoen_USen_US
dc.publisherPenerbit Universiti Kebangsaan Malaysiaen_US
dc.relation.ispartofOpen Accessen_US
dc.relation.ispartofSains Malaysiana
dc.sourceScopus
dc.subjectCopper(II) nitrate trihydrateen_US
dc.subjectFree glutamateen_US
dc.subjectOptical fiber chemical sensoren_US
dc.subjectSol-gel glass powderen_US
dc.titleAn optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samplesen_US
dc.title.alternativeSains Malays.en_US
dc.typeArticleen_US
dspace.entity.typePublication

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