Sobhi Hamid Reza, Mohammadzadeh Farzaneh, Behbahani Mohammad, Yeganeh Mojtaba, Esrafili Ali
Department of Chemistry, Payame Noor University, Tehran, Iran.
Department of Chemistry, Payame Noor University, Tehran, Iran.
Food Chem. 2022 Aug 15;385:132644. doi: 10.1016/j.foodchem.2022.132644. Epub 2022 Mar 11.
Herein, a facile dispersive micro-solid phase extraction (d-µSPE) procedure using carboxylated multi-walled carbon nanotubes modified with silver nanoparticles (Ag/MWCNTs-COOH) was successfully developed for the adsorption and subsequent determination of low levels of two well-known contaminants, namely bisphenol A and S (BPA and BPS) in water and soft drink samples. The detection and measurement of the above-mentioned compounds were performed by HPLC-UV instrument. The applied d-µSPE procedure has several advantages such as rapidity, high degree of sensitivity, precision and efficiency. A combination of polar/non-polar interactions seems to play a key role in the adsorption process. Under the optimized conditions, the calibration curves were linear over the concentration range of 1-500 µg/L for the both targets. The practical limit of quantifications (LOQ) for the both analytes were determined to be 1.0 µg/L. The average relative recoveries obtained from the fortified samples varied between 92 and 110% with the relative standard deviations (RSD%) of 2.9-9.5%.
在此，成功开发了一种简便的分散微固相萃取（d-µSPE）方法，该方法使用用银纳米颗粒修饰的羧基化多壁碳纳米管（Ag/MWCNTs-COOH），用于吸附并随后测定水和软饮料样品中两种著名污染物双酚A和双酚S（BPA和BPS）的低含量。上述化合物的检测和测定通过HPLC-UV仪器进行。所应用的d-µSPE方法具有快速、高灵敏度、高精度和高效率等优点。极性/非极性相互作用的组合似乎在吸附过程中起关键作用。在优化条件下，两种目标物的校准曲线在1-500 µg/L的浓度范围内呈线性。两种分析物的实际定量限（LOQ）均确定为1.0 µg/L。加标样品的平均相对回收率在92%至110%之间，相对标准偏差（RSD%）为2.9-9.5%。
