超声辅助离子液体分散液液微萃取-电感耦合等离子体发射光谱法测定饮料中的锑和锡。
Determination of antimony and tin in beverages using inductively coupled plasma-optical emission spectrometry after ultrasound-assisted ionic liquid dispersive liquid-liquid phase microextraction.
机构信息
Department of Applied Chemistry, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Johannesburg 2028, South Africa.
Analytical Facility, University of Johannesburg, P.O. Box: 524, Auckland Park 2006, South Africa.
出版信息
Food Chem. 2017 Dec 15;237:904-911. doi: 10.1016/j.foodchem.2017.06.058. Epub 2017 Jun 8.
The aim of this study was to develop a simple and fast ultrasound-assisted ionic liquid dispersive liquid-liquid phase microextraction (UA-IL-DLLME) method for preconcetration of trace antimony and tin in beverage samples. The novelty of this study was based on the application of ligandless UA-IL-DLLME using low-density ionic liquid and organic solvents for preconcentration of Sb and Sn. The concentration of Sb and Sn were quantified using ICP-OES. Under the optimum conditions, the calibration graph was found to be LOQ-250µgL (r=0.9987) for Sb and LOQ-350µgL for Sn. The LOD and LOQ of Sb and Sn ranged from 1.2to 2.5ngL and 4.0 to 8.3ngL, respectively, with high preconcentration factors. The precisions (%RSD) of the proposed method ranged from 2.1% to 2.5% and 3.9% to 4.7% for Sb and Sn, respectively. The proposed method was successfully applied for determination of Sb and Sn in beverages.
本研究旨在开发一种简单快速的超声辅助离子液体分散液液微萃取（UA-IL-DLLME）方法，用于预浓缩饮料样品中的痕量锑和锡。本研究的新颖之处在于应用无配体的 UA-IL-DLLME 方法，使用低密度离子液体和有机溶剂预浓缩 Sb 和 Sn。使用 ICP-OES 定量 Sb 和 Sn 的浓度。在最佳条件下，Sb 的校准曲线的 LOQ-250µgL（r=0.9987），Sn 的 LOQ 为 350µgL。Sb 和 Sn 的检出限和定量限范围分别为 1.2 至 2.5ngL 和 4.0 至 8.3ngL，具有较高的预浓缩因子。该方法的精密度（%RSD）范围分别为 2.1%至 2.5%和 3.9%至 4.7%，用于 Sb 和 Sn 的测定。该方法成功应用于饮料中 Sb 和 Sn 的测定。
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