Tokalıoğlu Şerife, Shahir Shukria, Yılmaz Yakup, Patat Şaban
Erciyes University, Faculty of Sciences, Chemistry Department, 38039, Kayseri, Turkey.
Erciyes University, Faculty of Sciences, Chemistry Department, 38039, Kayseri, Turkey.
Talanta. 2024 Jan 1;266(Pt 1):125002. doi: 10.1016/j.talanta.2023.125002. Epub 2023 Jul 29.
Magnetic mesoporous carbon (FeO@C, MMC) was synthesized and characterized. It was used for the first time as a sorbent for the magnetic dispersive solid phase microextraction (M-dSPμE) of copper and lead in water and vegetables. FAAS was used to determine the analyte concentrations after elution. The MMC was found to be have surface area of 145.9 m g and average pore diameter of 15 nm. The analytical parameters affecting M-dSPμE of copper and lead were optimized. They were pH of sample, 6; eluent, 2 mol L HCl (3 mL); and sample volume, 250 mL. The MMC reaches equilibrium very fast without vortexing for adsorption and only 5 s for elution. The LOD and PF of the M-dSPμE method for copper and lead were found to be 0.87 μg L and 83 for Cu(II) and 2.8 μg L and 167 for Pb(II), respectively. The precision of the M-dSPμE method was found to be ≤ 3.2%. The M-dSPμE method was verified by certificate reference materials (TMDA-53.3 Fortified Lake water and NIST SRM 1573a Tomato Leaves). It was successfully applied to the determination of copper and lead in lake water, wastewaters, sea water, radish, spinach, lettuce, and celery samples.
合成并表征了磁性介孔碳（FeO@C，MMC）。它首次被用作水和蔬菜中铜和铅的磁性分散固相微萃取（M-dSPμE）的吸附剂。洗脱后采用火焰原子吸收光谱法（FAAS）测定分析物浓度。发现MMC的表面积为145.9 m²/g，平均孔径为15 nm。优化了影响铜和铅M-dSPμE的分析参数。它们分别是样品pH值为6；洗脱剂为2 mol/L HCl（3 mL）；样品体积为250 mL。MMC在不涡旋的情况下吸附能很快达到平衡，洗脱仅需5 s。M-dSPμE法测定铜和铅的检出限（LOD）和富集因子（PF）分别为：Cu（II）为0.87 μg/L和83，Pb（II）为2.8 μg/L和167。发现M-dSPμE法的精密度≤3.2%。通过有证标准物质（TMDA-53.3强化湖水和NIST SRM 1573a番茄叶）对M-dSPμE法进行了验证。该方法成功应用于湖水、废水、海水、萝卜、菠菜、生菜和芹菜样品中铜和铅的测定。
