Akkaya Erhan, Chormey Dotse Selali, Bakırdere Sezgin
Department of Chemistry, Yildiz Technical University, 34349, Istanbul, Turkey.
Environ Monit Assess. 2017 Sep 20;189(10):513. doi: 10.1007/s10661-017-6232-8.
In this study, solidified floating organic drop microextraction (SFODME) by 1-undecanol was combined with slotted quartz tube flame atomic absorption spectrometry (SQT-FAAS) for the determination of cadmium at trace levels. Formation of a complex with 4,4'-dimethyl-2,2'-bipyridine facilitated the extraction of cadmium from aqueous solutions. Several chemical variables were optimized in order to obtain high extraction outputs. Parameters such as concentration of the ligand, pH, and amount of buffer solution were optimized to enhance the formation of cadmium complex. The SFODME method was assisted by dispersion of extractor solvent into aqueous solutions using 2-propanol. Under the optimum extraction and instrumental conditions, the limit of detection and limit of quantitation values obtained for cadmium using the combined methods (SFODME-SQT-FAAS) were found to be 0.4 and 1.3 μg L, respectively. Matrix effects on the method were also examined for tap water and wastewater, and spiked recovery results were found to be very satisfactory. Graphical Abstract SFODME-SQT-FAAS system for sensitive determination of cadmium.
在本研究中，采用1-十一醇进行固化浮动有机滴微萃取（SFODME），并结合缝管石英管火焰原子吸收光谱法（SQT-FAAS）测定痕量镉。与4,4'-二甲基-2,2'-联吡啶形成络合物有助于从水溶液中萃取镉。为了获得高萃取效率，对几个化学变量进行了优化。优化了配体浓度、pH值和缓冲溶液用量等参数，以增强镉络合物的形成。通过使用2-丙醇将萃取剂溶剂分散到水溶液中来辅助SFODME方法。在最佳萃取和仪器条件下，采用联合方法（SFODME-SQT-FAAS）测定镉时，检测限和定量限分别为0.4和1.3 μg L。还对自来水和废水的基体效应进行了考察，加标回收率结果非常令人满意。图形摘要：用于灵敏测定镉的SFODME-SQT-FAAS系统。
