Simultaneous enrichment and determination of cadmium and mercury ions using magnetic PAMAM dendrimers as the adsorbents for magnetic solid phase extraction coupled with high performance liquid chromatography

Yongyong Yuan; Yalin Wu; Hongyuan Wang; Yayan Tong; Xueying Sheng; Yi Sun; Xianqi Zhou; Qingxiang Zhou

doi:10.1016/j.jhazmat.2019.121658

Simultaneous enrichment and determination of cadmium and mercury ions using magnetic PAMAM dendrimers as the adsorbents for magnetic solid phase extraction coupled with high performance liquid chromatography

J Hazard Mater. 2020 Mar 15:386:121658. doi: 10.1016/j.jhazmat.2019.121658. Epub 2019 Nov 10.

Authors

Yongyong Yuan¹, Yalin Wu¹, Hongyuan Wang¹, Yayan Tong¹, Xueying Sheng¹, Yi Sun¹, Xianqi Zhou¹, Qingxiang Zhou²

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum Beijing, Beijing 102249, China.
² State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum Beijing, Beijing 102249, China. Electronic address: zhouqx@cup.edu.cn.

PMID: 31740318
DOI: 10.1016/j.jhazmat.2019.121658

Abstract

In present study, a sensitive and efficient method based on magnetic PAMAM dendrimers as the sorbents for magnetic solid-phase extraction (MSPE) coupled with high performance liquid-phase chromatography and ultraviolet variable wavelength detector (HPLC-VWD) was developed for simultaneous determination of trace cadmium and mercury ions. Sodium diethyldithiocarbamate (DDTC-Na) was used as the chelating agent during the elution process. Parameters that would affect the extraction efficiency including PAMAM generation, adsorbent dosage, adsorption time, elution time and volume, pH and coexisting ions were investigated to achieve the best adsorption efficiency. Under the optimal conditions, good linear relationship was obtained in the range of 0.05-200 μg L^-1 for Cd²⁺ and 0.1-200 μg L^-1 for Hg²⁺, and the limits of detection were 0.016 and 0.040 μg L^-1, respectively. The spiked recoveries of Cd²⁺ and Hg²⁺ were satisfied in the range of 91.5-105% (n = 3). The proposed method was proved to be an alternative and reliable method to determine trace Cd²⁺ and Hg²⁺ in water samples.

Keywords: Cadmium; High performance liquid-phase chromatography; Magnetic; Magnetic solid-phase extraction; Mercury; PAMAM dendrimers.

Publication types

Research Support, Non-U.S. Gov't