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

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

An 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 b...

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Main Authors: Noor Zuhartini Md Muslim, Musa Ahmad, Lee, Yook Heng, Bahruddin Saad
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2018
Online Access:http://journalarticle.ukm.my/12055/
http://journalarticle.ukm.my/12055/
http://journalarticle.ukm.my/12055/1/UKM%20SAINSMalaysiana%2047%2804%29Apr%202018%2008.pdf
id ukm-12055
recordtype eprints
spelling ukm-120552018-09-16T23:10:41Z http://journalarticle.ukm.my/12055/ An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples Noor Zuhartini Md Muslim, Musa Ahmad, Lee, Yook Heng Bahruddin Saad, An 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. Penerbit Universiti Kebangsaan Malaysia 2018-04 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/12055/1/UKM%20SAINSMalaysiana%2047%2804%29Apr%202018%2008.pdf Noor Zuhartini Md Muslim, and Musa Ahmad, and Lee, Yook Heng and Bahruddin Saad, (2018) An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples. Sains Malaysiana, 47 (4). pp. 707-713. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid47bil4_2018/KandunganJilid47Bil4_2018.htm
repository_type Digital Repository
institution_category Local University
institution Universiti Kebangasaan Malaysia
building UKM Institutional Repository
collection Online Access
language English
description An 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.
format Article
author Noor Zuhartini Md Muslim,
Musa Ahmad,
Lee, Yook Heng
Bahruddin Saad,
spellingShingle Noor Zuhartini Md Muslim,
Musa Ahmad,
Lee, Yook Heng
Bahruddin Saad,
An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples
author_facet Noor Zuhartini Md Muslim,
Musa Ahmad,
Lee, Yook Heng
Bahruddin Saad,
author_sort Noor Zuhartini Md Muslim,
title An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples
title_short An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples
title_full An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples
title_fullStr An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples
title_full_unstemmed An optical sensor based on immobilized copper(II) ions for the determination of free glutamate in food samples
title_sort optical sensor based on immobilized copper(ii) ions for the determination of free glutamate in food samples
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2018
url http://journalarticle.ukm.my/12055/
http://journalarticle.ukm.my/12055/
http://journalarticle.ukm.my/12055/1/UKM%20SAINSMalaysiana%2047%2804%29Apr%202018%2008.pdf
first_indexed 2023-09-18T20:01:45Z
last_indexed 2023-09-18T20:01:45Z
_version_ 1777406895255977984

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