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-1, 90-150 ng L-1 and 200-500 ng L-1, 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.

中文翻译：

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色散超声辅助浊点-色散-固相萃取-电感耦合等离子体发射光谱法测定蔬菜和水样中的痕量金属。

开发了一种结合超声辅助浊点萃取（UA-CPE）和分散μ-固相萃取（D-μ-SPE）的简单方法，用于将As，Cd，Cr，Co，Sb，Pb和Tl预富集到电感耦合等离子体中光学发射光谱仪（ICP-OES）。在最佳条件下，线性，检测限和定量限分别为0.20-1000 µg L-1、90-150 ng L-1和200-500 ng L-1。报告为相对标准偏差的日内（n = 20）和日内（n = 5）精度范围为1.5％至3.5％和1.9-4.5％。使用CRM BCR679，NIST SRM 1573a和SRM 1640a以及加标回收率实验研究了该方法的真实性。回收率令人满意，相对误差在97％至99.3％和-4.0％至2.4％之间。