当前位置：
X-MOL 学术
›
Electroanalysis
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Silica Gel Functionalized with 4‐Amino‐5‐(4pyridyl)‐4H‐1,2,4‐triazole‐3‐thiol and their Use as a Copper Sorbent and Electromediator for Voltammetric Detection of Ascorbic Acid
Electroanalysis ( IF 2.7 ) Pub Date : 2018-09-14 , DOI: 10.1002/elan.201800361 Maiara de Souza Magossi 1 , Vitor Alexandre Maraldi 1 , Mariana de Souza Magossi 1 , Newton Luiz Dias Filho 2 , Devaney Ribeiro do Carmo 1
Electroanalysis ( IF 2.7 ) Pub Date : 2018-09-14 , DOI: 10.1002/elan.201800361 Maiara de Souza Magossi 1 , Vitor Alexandre Maraldi 1 , Mariana de Souza Magossi 1 , Newton Luiz Dias Filho 2 , Devaney Ribeiro do Carmo 1
Affiliation
|
In this work, the 3‐chloropropyl silica gel (SG) was prepared and organofunctionalized with 4‐amino‐5‐(4pyridyl)‐4H‐1,2,4‐triazole‐3‐thiol (SGA), that was characterized by infrared spectroscopy (FTIR) and cyclic voltammetry (CV). The cupric ions (Cu2+) sorption on the silica functionalized surface (CuSGA) were performed in aqueous solution, at room temperature. It was performed a systematic study about voltammetric behavior of CuSGA, where the cyclic voltammogram of graphite paste electrode modified with CuSGA exhibited a single redox pair with formal potential (Eθ′)=0.30 V assigned to the process Cu+/Cu2+, (KCl 1.0 mol L−1, v=20 mV s−1). The graphite paste electrode modified with CuSGA was sensitive to different concentrations of ascorbic acid and then an analytical curve could be constructed, with a linear response of 6.0×10−6 to 9.0×10−5 mol L−1 (R=0.9988) and a relative standard deviation of ±2.5 % (n=3). The detection limit (3σ) and amperometric sensitivity were 4.78×10−6 mol L−1 and 115.96 mA/mol L−1, respectively.
中文翻译：
用4-氨基-5-（4-吡啶基）-4H-1,2,4-三唑-3-硫醇官能化的硅胶及其作为铜吸收剂和电介质用于抗坏血酸伏安检测
在这项工作中，制备了3-氯丙基硅胶（SG）并用4-氨基-5-（4-吡啶基）-4H-1,2,4-三唑-3-硫醇（SGA）进行了有机官能化光谱（FTIR）和循环伏安法（CV）。在室温下，在水溶液中进行铜离子（Cu 2+）在二氧化硅官能化表面（CuSGA）上的吸附。它进行约CuSGA，凡与CuSGA改性石墨糊电极的循环伏安图显示出一个单一的氧化还原对与正式潜在的伏安特性的系统研究（Ë θ ' ）=分配给该进程的Cu 0.30 V + /铜2+， （KCl 1.0 mol L -1，v = 20 mV s -1）。用CuSGA修饰的石墨糊电极对不同浓度的抗坏血酸敏感，然后可以建立分析曲线，线性响应为6.0×10 -6至9.0×10 -5 mol L -1（R = 0.9988）和相对标准偏差为±2.5％（n = 3）。检测极限（3σ）和安培灵敏度分别为4.78×10 -6 mol L -1和115.96 mA / mol L -1。
更新日期：2018-09-14
中文翻译：
用4-氨基-5-（4-吡啶基）-4H-1,2,4-三唑-3-硫醇官能化的硅胶及其作为铜吸收剂和电介质用于抗坏血酸伏安检测
在这项工作中，制备了3-氯丙基硅胶（SG）并用4-氨基-5-（4-吡啶基）-4H-1,2,4-三唑-3-硫醇（SGA）进行了有机官能化光谱（FTIR）和循环伏安法（CV）。在室温下，在水溶液中进行铜离子（Cu 2+）在二氧化硅官能化表面（CuSGA）上的吸附。它进行约CuSGA，凡与CuSGA改性石墨糊电极的循环伏安图显示出一个单一的氧化还原对与正式潜在的伏安特性的系统研究（Ë θ ' ）=分配给该进程的Cu 0.30 V + /铜2+， （KCl 1.0 mol L -1，v = 20 mV s -1）。用CuSGA修饰的石墨糊电极对不同浓度的抗坏血酸敏感，然后可以建立分析曲线，线性响应为6.0×10 -6至9.0×10 -5 mol L -1（R = 0.9988）和相对标准偏差为±2.5％（n = 3）。检测极限（3σ）和安培灵敏度分别为4.78×10 -6 mol L -1和115.96 mA / mol L -1。
京公网安备 11010802027423号