化学
石墨烯
纳米复合材料
分子印迹聚合物
甲基丙烯酸
检出限
电化学
电化学气体传感器
电极
核化学
碳糊电极
共聚物
胶体金
氧化物
选择性
聚合物
纳米颗粒
纳米技术
色谱法
有机化学
循环伏安法
材料科学
物理化学
催化作用
作者
Leila Mardani,Mohammad Taghi Vardini,Moosa Es’haghi,Ebrahim Ghorbani‐Kalhor
出处
期刊:Analytical Sciences
[Japan Society for Analytical Chemistry]
日期:2019-06-27
卷期号:35 (11): 1173-1182
被引量:14
标识
DOI:10.2116/analsci.19p107
摘要
In this study, a new molecularly imprinted polymer (MIP) based nanocomposite was synthesized then used to determine epinephrine (EPN) by the use of an electrochemical sensor modified by it. Typical techniques for the synthesis of MIP have disadvantages, such as weak binding sites, low mass transfer and low selectivity. One of the ways to improve electrochemical properties is the use of graphene oxide (GR-Ox) and modification of its surface. For this purpose, GR-Ox was initially magnetized (MGR-Ox), then its surface was coated with a silica layer, and gold nanoparticles (AuNPs) were coated on its surface. Subsequently, copolymerization of methacrylic acid (MAA) and N,N′-methylene-bis-acrylamide (MBA) in the presence of EPN was performed on the MGO-AuNPs surface. Afterwards, a selective carbon paste electrode (CPE) with synthetic nanocomposite was fabricated to detect EPN. Under optimal conditions, a linear range from 10−8 to 5.0 × 10−7 M was obtained for the measurement of EPN in urine and blood with a detection limit of 5 × 10−9 M (S/N = 3).
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