Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

Abstract

A film carbon veil-based electrode (FCVE) modified with non-ionic surfactant Triton X-100 (TrX100) has been developed for nitrite determination. A new simple and producible technique of hot lamination (heat sealing) has been used for the FCVE manufacturing. The paper presents the findings of investigating the FCVE and the TrX100/FCVE by using voltammetry, chronoamperometry, and scanning electron microscopy. Modification of the electrode with TrX100 improves the hydrophilic property of its surface, which results in a larger electrode active area and higher sensitivity. Optimal conditions for nitrite determination with the use of the TrX100/FCVE have been identified. The linear range (LR) and the limit of detection (LOD) are 0.1–100 μM and 0.01 μM, respectively. The relative standard deviation (RSD) does not exceed 2.3%. High selectivity of the sensor ensures its successful application for the analysis of real samples (sausage products and natural water). The obtained results accord well with the results of the standard spectrophotometric method.

Developing Activated Carbon Veil Electrode for Sensing Salivary Uric Acid

“…At the beginning of the experiment, in order to determine UA, an attempt was made to use the earlier proposed sensors based on a carbon veil modified by phytosynthesized gold nanoparticles (gr-Au/CVE) [28] and a non-ionogenic surfactant Triton X-100 (TrX100/CVE) [26]. Figure S1 shows the LS voltammograms of 0.1 mM UA on gr-Au/CVE and TrX100/CVE.…”

“…The working electrodes were fabricated by applying the hot lamination technology [26,28]. The production process is described below.…”

“…CV is an advanced material for manufacturing highly sensitive (bio)sensors with the use of amperometric or voltammetric methods of signal recording [25]. Currently, voltammetric and amperometric sensors based on CV have been developed for the determination of nitrites [26,27], ascorbic acid [28], and ketoprofen [29]. Due to the CV effective surface, when developing highly sensitive electrochemical sensors, it has become possible to stop using additional carbon-based modifiers, such as carbon nanotubes, graphene, graphene oxide [26,28].…”

“…Currently, voltammetric and amperometric sensors based on CV have been developed for the determination of nitrites [26,27], ascorbic acid [28], and ketoprofen [29]. Due to the CV effective surface, when developing highly sensitive electrochemical sensors, it has become possible to stop using additional carbon-based modifiers, such as carbon nanotubes, graphene, graphene oxide [26,28]. Tarasov et al [30] used CV in combination with the single-sided hot lamination technology to manufacture a potentiometric sensor system for evaluating the antioxidant activity of human skin.…”

Flexible Potentiometric Sensor System for Non-Invasive Determination of Antioxidant Activity of Human Skin: Application for Evaluating the Effectiveness of Phytocosmetic Products

“…Since the CV displays such features as electrical conductivity, softness, and flexibility, it is these features that explain the CV popularity in applied electrochemistry. The CV can be used for manufacturing electrodes for batteries [36], capacitors [37], microbial fuel cells [38], and generator cells [39]; heating elements [40]; and sensors for the determination of ascorbic acid [41] and nitrite ions [42]. The analysis of Web of Science and Scopus publications has not revealed any case reporting the use of CV for monitoring the AOA of biological objects.…”