The electrochemical behavior of 6-benzyl adenine (6-BA) has been studied in 0.1 mol L(-1) HAc-NaAc solution (pH 3.8). Cyclic voltammetry, single-sweep polarography and direct current polarography were employed to clarify the mechanism of the electrode process; the kinetic parameters of the rate-determining step were determined. Reduction of 6-BA involves two pH-dependent processes, corresponding to the overall irreversible reduction of the 1,6 and 3,2 N=C bonds. Each reduction stage consists a preprotonation of the nitrogen atom at the electroactive site and a rapid two-electron transfer. In the presence of 6-BA, the reduction potentials of some ions were shifted. Under the given conditions, 6-BA displays one irreversible reduction peak controlled by adsorption. Two linear response were observed in the range 2.0 x 10(-8) - 8.0 x 10(-7) mol L(-1) and the range 1.0 x 10(-6) - 8.0 x 10(-6) mol L(-1), with correlation coefficients of 0.9995 and 0.9998, respectively. The detection limit is 7.1 x 10(-9) mol L(-1). The method had been applied to the determination of 6-BA in bean sprout samples with satisfactory results.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2116/analsci.21.1223 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Platinum hydride formation during cathodic corrosion in aqueous solutions.
Nat Mater
January 2025
Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands.
Cathodic corrosion is an electrochemical phenomenon that etches metals at moderately negative potentials. Although cathodic corrosion probably occurs by forming a metal-containing anion, such intermediate species have not yet been observed. Here, aiming to resolve this long-standing debate, our work provides such evidence through X-ray absorption spectroscopy.
View Article and Find Full Text PDFInfluence of alginate extraction conditions from the brown seaweed Dictyota mertensii on the functional properties of a novel glycerol plasticized alginate film.
Carbohydr Polym
March 2025
Department of Engineering and Technology, Universidade Federal Rural do Semi-Árido, Mossoró Campus, Mossoró 59625-900, Rio Grande do Norte, Brazil.
Alginate films were prepared from the brown seaweed Dictyota mertensii using glycerol as a plasticizer. The effects of extraction conditions-time, temperature, and NaCO concentration-on the optical, barrier, and mechanical properties of the films were investigated using a central composite design (CCD). ANOVA and F tests confirmed the models' statistical significance at p ≤ 0.
View Article and Find Full Text PDFSelective synthesis of triacylglycerols by the ADS-17-supported Candida antarctica lipase B through esterification of oleic acid and glycerol.
J Sci Food Agric
January 2025
School of Food Science, Guangdong Pharmaceutical University, Zhongshan, China.
Background: Immobilized enzyme possessing both high activity and good selectivity is important in practice. In this study, Candida antarctica lipase B (CALB) was immobilized onto the macroporous resin ADS-17 for triacylglycerol (TAG) synthesis through esterification of oleic acid and glycerol. The reaction conditions were optimized by single-factor study and orthogonal test, and the reusability of the immobilized CALB (CALB@ADS-17) was evaluated.
View Article and Find Full Text PDFOptimizing the Construction and Activation of 3D-Printed Electrochemical Sensors: An Experimental Design Approach for Simultaneous Electroanalysis of Paracetamol and Caffeine.
ACS Omega
January 2025
Laboratory of Carbon and Ceramic Materials (LMC), Department of Physics, Center of Exact Sciences, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo, Brazil.
This work presents an optimization of the construction, treatment, and activation of 3D-printed electrochemical sensors (E-3D). For this, was used a 2-full factorial design examining three key variables at two levels: electrode height, electrode diameter, and printing speed. Moreover, it evaluates various physical, chemical, and electrochemical methods to treat and activate the E-3D surface.
View Article and Find Full Text PDFNovel green synthesis of Al-Fe₃O₄ nanocomposite for magnetic d-μSPE of Cd(II) from water and food samples.
Food Chem
January 2025
Erciyes University, Faculty of Sciences, Department of Chemistry, 38039 Kayseri, Turkey; Technology Research and Application Center (ERU-TAUM), Erciyes University, 38039 Kayseri, Turkey; Turkish Academy of Sciences (TUBA), Cankaya, Ankara, Turkey. Electronic address:
A novel and green nanocomposite (Al-Fe₃O₄) was synthesized and used for the magnetic d-μSPE method for separating and enriching Cd(II) from dried fruit samples. Aluminum foil waste and banana peels were used as the precursors. The green nanocomposite was characterized using FTIR, XRD, and FE-SEM techniques.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!