%0 Journal Article
%T A Glassy Carbon Electrode Modified with Cellulose Nanofibrils from <i>Ammophila</i> <i>arenaria</i> for the Sensitive Detection of L-Trytophan
%A Sondes Bourigua
%A Feriel Boussema
%A Zayneb Jebali
%A Houcine Barhoumi
%A Hatem Majdoub
%A Abderrazak Maaref
%A Nicole Jaffrezic-Renault
%J Journal of Sensor Technology
%P 35-50
%@ 2161-1238
%D 2024
%I Scientific Research Publishing
%R 10.4236/jst.2024.143003
%X L-tryptophan is an essential amino acid for human health. Nanofibrillated cellulose (NFC) from marram grass (<i>Ammophila</i> <i>arenaria</i>) extracted from plants harvested in the center of Tunisia was used for the first time for the modification of a glassy carbon electrode (GCE), for the sensitive detection of L-tryptophan (Trp). After spectroscopic and morphological characterization of the extracted NFC, the GC electrode modification was monitored through cyclic voltammetry. The NFC-modified electrode exhibited good analytical performance in detecting Trp with a wide linear range between 7.5 &#215; 10<sup>&#8722;4</sup> mM and 10<sup>&#8722;2</sup> mM, a detection limit of 0.2 &#181;M, and a high sensitivity of 140.0 &#181;A&#8729;mM<sup>&#8722;1</sup>. Additionally, the NFC/GCE showed a good reproducibility, good selectivity versus other amino acids, uric acid, ascorbic acid, and good applicability to the detection of Trp in urine samples.
%K Nanofibrillated Cellulose
%K Chitosan
%K Chemically Modified Glassy Carbon Electrode
%K Electrochemical Detection
%K L-Tryptophan
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=136176