title: Evaluation of liquid cathode glow discharge-atomic emission spectrometry for determination of copper and lead in ores samples.
abstract: In this study, a liquid cathode glow discharge-atomic emission spectrometry (LCGD-AES) was constructed for simultaneously determination of Cu and Pb in digested ores samples, in which the glow discharge was produced between the needle-like Pt anode and electrolyte overflowing from quartz capillary. The stability of LCGD and the effects of discharge voltage, capillary diameter and flow rate on emission intensity were systematically investigated. The limits of detections (LODs) of Cu and Pb were compared with those measured by closed-type electrolyte cathode discharge-atomic emission spectrometry (ELCAD-AES). In addition, the measured results of LCGD were verified by ICP-AES. The results showed that the optimization analytical conditions were 675V discharge voltage, 1.0mm capillary diameter and 5.5mLmin-1flow rate. The analytical response curves had good linearity in the range of 1-10mgL-1. The RSD was 2.05% for Cu and 1.27% for Pb. The LODs of Cu and Pb were 0.36 and 0.20mgL-1, respectively, which are in agreement with the closed-type ELCAD. The obtained results of Cu and Pb in ore samples by LCGD are consistent with the reference materials of ICP. The recovery of samples is ranged from 85.2-105.6%, suggesting that the determinated results have high accuracy. All the results indicated that the LCGD can provide an alternative analytical method for the determination of metal elements in ores samples.
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. Electronic address: yujie741008@163.com.
authors.forename: Jie
authors.initials: J
authors.lastname: Yu
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Shuxiu
authors.initials: S
authors.lastname: Yang
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China; Editorial Department of the University Journal, Northwest Normal University, Lanzhou 730070, China. Electronic address: luqf@nwnu.edu.cn.
authors.forename: Quanfang
authors.initials: Q
authors.lastname: Lu
authors.affiliation: Key Lab of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Duixiong
authors.initials: D
authors.lastname: Sun
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Jidong
authors.initials: J
authors.lastname: Zheng
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Wang
authors.affiliation: Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Yang
keywords: Atomic emission spectrometry (AES); Copper; Lead; Liquid cathode glow discharge (LCGD); Multi-elements determination; Ores