A Glassy Carbon Electrode Modified with Cellulose Nanofibrils from Ammophila arenaria for the Sensitive Detection of L-Trytophan  

作　　者：Sondes Bourigua Feriel Boussema Zayneb Jebali Houcine Barhoumi Hatem Majdoub Abderrazak Maaref Nicole Jaffrezic-Renault Sondes Bourigua;Feriel Boussema;Zayneb Jebali;Houcine Barhoumi;Hatem Majdoub;Abderrazak Maaref;Nicole Jaffrezic-Renault(Laboratory of Advanced Materials and Interfaces, Faculty of Sciences, University of Monastir, Monastir, Tunisia;Institute of Analytical Sciences, University of Lyon, Villeurbanne, France)

机构地区：[1]Laboratory of Advanced Materials and Interfaces, Faculty of Sciences, University of Monastir, Monastir, Tunisia [2]Institute of Analytical Sciences, University of Lyon, Villeurbanne, France

出　　处：《Journal of Sensor Technology》2024年第3期35-50,共16页传感技术（英文）

摘　　要：L-tryptophan is an essential amino acid for human health. Nanofibrillated cellulose (NFC) from marram grass (Ammophila arenaria) 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 × 10−4 mM and 10−2 mM, a detection limit of 0.2 µM, and a high sensitivity of 140.0 µA∙mM−1. 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.L-tryptophan is an essential amino acid for human health. Nanofibrillated cellulose (NFC) from marram grass (Ammophila arenaria) 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 × 10−4 mM and 10−2 mM, a detection limit of 0.2 µM, and a high sensitivity of 140.0 µA∙mM−1. 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.

关 键 词：Nanofibrillated Cellulose CHITOSAN Chemically Modified Glassy Carbon Electrode Electrochemical Detection L-TRYPTOPHAN 

分 类 号：O62[理学—有机化学]