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Modified magnetic graphene oxide as an efficient adsorbent for preconcentration of tartrazine
Fullerenes, Nanotubes and Carbon Nanostructures ( IF 2.3 ) Pub Date : 2021-06-16 , DOI: 10.1080/1536383x.2021.1940152
Raziyeh Taban 1 , Shahla Elhami 1
Affiliation  

Abstract

In this research, novel magnetic Graphene Oxide/Fe3O4/Thiourea/Cethyltrimethyammonium Bromide nanocomposites were designed and fabricated as an efficient adsorbent in the service of micro-solid phase extraction for preconcentration of Tartrazine (Tar) before UV-Vis spectrophotometric detection. This adsorbent was fully characterized by Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Energy Dispersive X-ray (EDX) analysis. The mechanism of Tar adsorption was discussed. The operating parameters affecting preconcentration efficiency and spectrophotometric determination were optimized. Under the optimum conditions, this method exhibited a linear range from 5.0 to 1200.0 ng mL−1 (R2=0.9993), with a detection limit of 1.1 ng mL−1. Relative standard deviations (RSD) for intra (n = 10) and inter-day (n = 8) of Tar (400 ng mL−1) were 2.2 and 4.8%, respectively. The satisfactory results of analysis of real samples indicate that the method is very favored in the analysis of various complex matrices.



中文翻译:

改性磁性氧化石墨烯作为酒石黄预浓缩的高效吸附剂

摘要

在这项研究中,设计并制造了新型磁性氧化石墨烯/Fe 3 O 4 /硫脲/Cethyltrimethyammonium Bromide纳米复合材料,作为一种有效的吸附剂,用于微固相萃取,用于在紫外-可见分光光度法检测之前对酒石黄(Tar)进行预浓缩。该吸附剂通过傅里叶变换红外 (FT-IR) 光谱、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和能量色散 X 射线 (EDX) 分析进行了全面表征。讨论了焦油吸附的机理。优化了影响预浓缩效率和分光光度测定的操作参数。在最佳条件下,该方法的线性范围为 5.0 至 1200.0 ng mL -1 (R2 = 0.9993),检测限为 1.1 ng mL -1Tar (400 ng mL -1 )内 (n = 10) 和日间 (n = 8) 的相对标准偏差 (RSD)分别为 2.2% 和 4.8%。实际样品分析结果令人满意,表明该方法在分析各种复杂基体时非常受青睐。

更新日期:2021-06-16
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