Sensitivity Improvement of the Oxidation of Tetracycline at Acetylene Black Electrode in the Presence of Sodium Dodecyl Sulfate

Abstract

The oxidation of tetracycline (TC) was investigated at an acetylene black electrode in the presence of sodium dodecyl sulfate (SDS). TC exhibited a sensitive oxidation peak in the medium system, which was attributed to the enhanced adsorption of protonated TC at the negatively charged SDS film on the electrode surface. The mechanism of the electrode process was discussed, and some experimental conditions were optimized. The oxidation peak current was proportional to TC concentration in the range of 1.2 Â 10 À7 -6.0 Â 10 À5 M, and based on three times the background signal, a detection limit of 1.2 Â 10 À8 M was obtained for 150 s accumulations. The method has been used to determine TC in honey and pharmaceutical, and the results compared favorably.

Electrochemical Biosensors Based on Nanostructured Carbon Black: A Review

“…The first studies related to investigation of CB as modifier for sensors preparation were reported only in the last decade. One of the highlight pioneering works was the electrochemical sensors reported by Dang et al [34] and Zhang [35,36]. In these cases, CB was designated with acetylene black for the voltammetric sensing of tetracycline, colchicine, and rutin.…”

“…All these data help to prove the excellent electrochemical behavior of CB nanoparticles, making it an exciting alternative carbon nanomaterial for construction of electrochemical sensors and biosensors. Currently, the use of CB for sensing purposes involves the electrochemical determination of pharmaceutical [4,[34][35][36][38][39][40][41][42][43], environmental contaminants [44][45][46][47][48][49][50][51][52][53][54][55][56][57], food additives [58][59][60][61], biomolecules [46,[62][63][64][65][66][67][68][69][70][71], and nicotine [12].…”

Optimizing the integrated pulsed amperometric multicycle step waveform for the determination of tetracyclines

“…From Table 3, we can find that the method developed by us is more sensitive than all the UV or DAD detection based methods. In comparison with other electrochemical detection based method, except for the methods based on the coulometric electrode assay detection [20] and on the usage of acetylene black electrode [22], our method is more sensitive than or roughly as sensitive as most of the other electrochemical detection based methods [1,[16][17][18]21,26]. Compared with mass detection [13][14][15], electrochemiluminescence [10] and chemiluminescence [11,12], the present method shows a relatively poorer sensitivity.…”

“…Thin layer chromatography [3], capillary electrophoresis [4,5] and high-performance liquid chromatography (HPLC) methods were used to determine antibiotics too. Of all these methods, HPLC coupled with different detection techniques such as UV or DAD [6][7][8][9], chemilumi-nescence [10][11][12], MS [13][14][15] and electrochemistry [1,[16][17][18][19][20][21][22] is the most common method to be used for the analysis of TCs.…”

Electrochemical Behaviors of Methocarbamol at an Acetylene Black-Ionic Liquid Modified Carbon Paste Electrode and its Electrochemical Determination

“…15 AB has porous structure and possesses many fascinating properties such as good conductivity, large surface area and strong adsorptive ability. 16,17 Thus, AB was used as a substitute of graphite powder in preparation of carbon paste electrode [18][19][20] and was also successfully used as a modifier to fabricate electrodes in electrochemistry to increase the determining sensitivity of different species such as rutin, 17 6-benzylaminopurine, 21 colchicine, 22 1-Naphthylacetic Acid, 23 2-chlorophenol. 24 However, electrochemical behaviors, electrochemical kinetics and electrochemical determination of MET using AB and ionic liquid 1-Benzyl-3-Methylimidazole hexafluorophosphate ([BnMIM]PF 6 ) modified carbon paste electrode (AB-[BnMIM]PF 6 /CPE) have not been reported yet.…”