Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa; DSI/NRF SARChI Chair: Nanotechnology for Water, University of Johannesburg, Doornfontein 2028, South Africa.
Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa; DSI/NRF SARChI Chair: Nanotechnology for Water, University of Johannesburg, Doornfontein 2028, South Africa; DSI/Mintek Nanotechnology Innovation Centre, University of Johannesburg, Doornfontein 2028, South Africa.
Food Chem. 2020 Aug 30;322:126749. doi: 10.1016/j.foodchem.2020.126749. Epub 2020 Apr 4.
A simple method combining ultrasound assisted cloud point extraction (UA-CPE) and dispersive μ-solid phase extraction (D-μ-SPE) was developed for preconcentration of As, Cd, Cr, Co, Sb, Pb and Tl to inductively coupled plasma optical emission spectrometric (ICP-OES). At optimum conditions, the linearity, limits of detection and limits of quantification were 0.20-1000 µg L, 90-150 ng L and 200-500 ng L, respectively. The intraday (n = 20) and intraday (n = 5) precisions reported as the relative standard deviation ranged from 1.5 to 3.5% and 1.9-4.5%. The trueness of the method was investigated using CRM BCR679, NIST SRM 1573a, and SRM 1640a, as well as spiked recovery experiments. Satisfactory recoveries and relative errors ranging from 97 to 99.3% and -4.0 to 2.4% were obtained. The proposed UA-CPE-D-µ-SPE/ICP-OES method was successfully applied for various real samples such as groundwater, bottled mineral water, river water and borehole water and food samples.
一种将超声辅助浊点萃取（UA-CPE）与分散μ固相萃取（D-μ-SPE）相结合的简单方法被开发用于电感耦合等离子体发射光谱法（ICP-OES）对砷、镉、铬、钴、锑、铅和铊的预浓缩。在最佳条件下，线性范围、检出限和定量限分别为 0.20-1000 µg L、90-150 ng L 和 200-500 ng L。日内（n = 20）和日间（n = 5）精密度分别以相对标准偏差表示，范围为 1.5-3.5%和 1.9-4.5%。通过使用 CRM BCR679、NIST SRM 1573a 和 SRM 1640a 以及加标回收实验来研究该方法的准确性。获得了 97-99.3%和-4.0-2.4%的回收率和相对误差。所提出的 UA-CPE-D-μ-SPE/ICP-OES 方法成功应用于各种实际样品，如地下水、瓶装矿泉水、河水和井水以及食品样品。
