A sensitive voltammetric analysis and detection of Alizarin Red S onto a glassy carbon electrode modified by an organosmectite

Sensitive determination of 4,6-dinitro-o-cresol based on a glassy carbon electrode modified with Zr-UiO-66 metal–organic framework entrapped FMWCNTs

“…A linear curve with a slope of 0.042 has been observed, and by comparing this slope value to the one of Nernst (0.059), we can conclude that the number of electrons exchanged during DNOC reduction reactions is equal to the number of protons consumed as shown in Scheme 1. 49,52,53 shows that a good linearity was obtained for the three reduction peaks without any mutual interference, thus proving the high sensitivity of the method (Fig. 9B-D).…”

“…A linear curve with a slope of 0.042 has been observed, and by comparing this slope value to the one of Nernst (0.059), we can conclude that the number of electrons exchanged during DNOC reduction reactions is equal to the number of protons consumed as shown in Scheme 1. 49,52,53…”

“…The limit of detection obtained from the reduction peak (Red3) of DNOC based on the formula 3 S b / m is 0.119 μM ( S b = 0.04997 and m = 1.249). 53 Sensitivity of the sensor was calculated from the slope of the lower segment of the calibration curve and found to be 1249 mA mM −1 (details in ESI SI-5†). Table 1 shows a comparison of our method with the other methods available in the literature for DNOC detection.…”

Evaluation of two core–shell (Ag2S@- and Bi2S3@-) sensors based on a metal–organic framework (NH2-MIL-125-Ti)/polyaniline for the electroanalysis of uric acid in urine samples

“…After the physicochemical characterization, the electrochemical characterization was performed using the potentiostat palmSens. In order to evaluate the permeability and conductivity of the prepared materials, the GCE modified with the thin film of each material was run inside The active surfaces of the bare GCE, Ag 2 S@NH 2 -MIL-125(Ti)/ PANI/GCE, and Bi 2 S 3 @NH 2 -MIL-125(Ti)/PANI/GCE were found to be 0.0029 cm 2 , 0.0095 cm 2 , and 0.0062 cm 2 , respectively, obtained from the Randles Sevcik equation 32,36,57,58 as shown in SI-6 (ESI †).…”

Preparation and Characterization of Alkali Activated Carbon Based Theobroma Cocoa Pods: Application for Electrochemical Determination of Xanthine in Fresh Fish Sample

“…[3,4] Biomass materials have been widely used as electrode materials for the modification of conventional working electrodes. The resulting modified electrodes were used for the sensing of compounds such as dyes, [5,6] pesticides, [7,8] phenolic, [9,10] heavy metals [11,12] constituent of pathological samples, [13,14] and food additives. [9,15] The ultimate and long term goal of the majority of such research is to develop miniaturized sensor devices for field deployment and point of care testing (POCT).…”