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首页> 外文期刊>Microchemical Journal: Devoted to the Application of Microtechniques in all Branches of Science >Multi-element determination of Cd, Pb, Cu, V, Cr, and Mn in ethanol fuel samples using energy dispersive X-ray fluorescence spectrometry after magnetic solid phase microextraction using CoFe2O4 nanoparticles
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Multi-element determination of Cd, Pb, Cu, V, Cr, and Mn in ethanol fuel samples using energy dispersive X-ray fluorescence spectrometry after magnetic solid phase microextraction using CoFe2O4 nanoparticles

机译：使用COFE2O4纳米颗粒在磁性固相微萃取后的能量分散X射线荧光光谱法使用能量分散X射线荧光光谱法的CD，Pb，Cu，V，Cr和Mn的多元素测定

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摘要

In this study, multi-element determination in ethanol fuel samples using energy dispersive X-ray fluorescence spectrometry (EDXRF) combined with magnetic solid phase microextraction (MSPME) was explored. The extraction and preconcentration of Cd, Pb, Cu, V, Cr, and Mn from ethanol fuel samples using CoFe2O4 nano- particles impregnated with 1-(2-pyridylazo)-naphthol (PAN) was carried out for posterior direct determination in the solid phase using EDXRF. Factors such as the concentration of PAN, pH value, time of extraction, and sample volume were optimized. Under the optimized conditions, linear calibration curves were obtained. The precisions for the determination of each element, expressed as relative standard deviations (RSD) of standard solutions containing 0.20 mg L-1 of Cu, Cd, Pb, Cr, V, and Mn and calculated from ten consecutive measure- ments, were 1.6, 2.8, 2.8, 4.0, 1.5, and 4.5%, respectively. The proposed method allowed the determination of metals with detection limits of 0.012, 0.013, 0.016, 0.012, 0.009, and 0.011 mg L-1 for Cu, Cd, Pb, Cr, V, and Mn, respectively. The method was successfully applied to the extraction and determination of Cd, Pb, Cu, V, Cr, and Mn in ethanol fuel samples.
机译：在该研究中，探讨了使用能量分散X射线荧光光谱法（EDXRF）与磁性固相微萃取（MSPME）结合的多元素测定。使用Cofe 2 O 4纳米颗粒浸渍有1-（2-吡啶氮氮杂氮）-Naphthol（PAN）的CD，Pb，Cu，V，Cr和Mn的萃取和前浓缩 - 在固体中进行后直接测定进行使用EDXRF的相位。优化了诸如平底锅，pH值，提取时间和样品体积的因素。在优化条件下，获得了线性校准曲线。确定每个元素的精度，表达为含有0.20mg，Cd，Pb，Cr，V和Mn的标准溶液的标准溶液的相对标准偏差（RSD），并从连续十个测量计算为1.6分别为2.8,2.8,4.0,1.5和4.5％。所提出的方法允许测定用于Cu，Cd，Pb，Cr，V和Mn的0.012,0.013,0.012,0.009和0.011mg L-1的检测限的金属的测定。该方法成功地应用于乙醇燃料样品中Cd，Pb，Cu，V，Cr和Mn的萃取和测定。

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