High Sensitive Determination of Pb and Zn in Refined Copper Ores Samples Using Liquid Cathode Glow Discharge-Atomic Emission Spectrometry

doi:10.3964/j.issn.1000-0593(2018)11-3550-08

	High Sensitive Determination of Pb and Zn in Refined Copper Ores Samples Using Liquid Cathode Glow Discharge-Atomic Emission Spectrometry
其他题名	液相阴极辉光放电原子发射光谱法高灵敏测定精铜矿中的铅和锌
	Yu Jie 1; Zhu Shu-wen 1; Lu Quan-fang1,2 ; Zhang Zhi-chao 1; Zhang Xiao-min1 ; Wang Xing1 ; Yang Wu1
	2018-11
发表期刊	SPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN	1000-0593
卷号	38 期号:11 页码:3550-3557
摘要	Monitoring of trace heavy metal ions in ores samples before the mining, smelting and processing is of great importance due to it high toxicity and gradual accumulation in the environment as well as in animal or human organs. The well-known atomic spectrometry analytical instruments, such as atomic fluorescence spectrometry (AFS), atomic absorption spectrometry (AAS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES), have been extensively employed for the determination of metal elements in various complex samples. However, these analytical instruments require bulky and costly devices, high power and large gases consumption. These shortcomings restrict their use within laboratory, preventing their use for field measurement and continuous monitoring. To meet the trend of miniaturization in analytical instrumentation and the requirements of on-line detection in field, electrolyte cathode discharge (ELCAD) has been developed by Cserfalvi in 1993 as an important tool in atomic spectrum analysis for element determination of liquid samples. In the original apparatus of ELCAD, the sample solution is acted as cathode, which overflows with typical flow rate of 8 similar to 10 mL.min(-1) from a pipette into about 35 mL reservoir completely filled with electrolyte solution, and a counter-electrode (mostly W or Ti rod) above it (2 similar to 4 mm) is the anode. The pipette is immersed into electrolyte solution and then curved upwards about 1 similar to 3 mm from the reservoir containing a grounded graphite electrode to make it electrically conductive. Since then, in order to improve the emission efficiency and discharge stability, many improvements for excitation source of ELCAD have been developed. In the present work, a novel liquid cathode glow discharge (LCGD) was successfully constructed based on the principle of ELCAD, in which the glow discharge plasma was generated between the needle-like Pt anode (diameter 0. 5 mm) and electrolyte (served as the liquid cathode) overflowing from a quartz capillary (1. 0 mm inner diameter). The vertical gap between capillary and pointed Pt wire is 2 mm. The quartz capillary was inserted into a graphite tube and protruded from the graphite tube about 2. 5 mm. The sample solution was introduced through the quartz capillary with the aid of a peristaltic pump at flow rate 4. 5 mL.min(-1), and then flowed over the top of capillary into the grooves on the graphite tube. This device can offer several advantages over conventional ELCAD. For example, sealed Pt wire into a quartz tube can form a Pt tip discharge and make the energy focus on a very tiny spot, which has lower energy consumption (<60 W) and higher excitation efficiency. In addition, several knots in peristaltic-pump tubing can reduce signal fluctuations of discharge induced by the peristaltic pump and improve the stability of discharge plasma. Furthermore, inserted the quartz capillary into graphite tube is excluded the reservoir of ELCAD, which can reduce the consumption of solution samples. To evaluate the analytical performance of LCGD, the simultaneous determination of Pb and Zn in digested refined copper ores samples with HNO3-HCl was carried out. The stability of LCGD and the effects of discharge condition, supporting electrolyte, solution pH and solution flow rate on emission intensity were systematically investigated. The limits of detections (LODs) of Pb and Zn were compared with those measured by closed-type ELCAD. In addition, the measured results of samples using LCGD were verified by ICP.
关键词	Liquid cathode glow discharge(LCGD) Atomic emission spectrometry (AES) Refined copper ores Trace heavy metals High sensitive determination
DOI	10.3964/j.issn.1000-0593(2018)11-3550-08
收录类别	SCIE ; EI
语种	中文
WOS研究方向	Spectroscopy
WOS类目	Spectroscopy
WOS记录号	WOS:000452247200037
出版者	OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
EI入藏号	20190806521504
EI主题词	Cathodes
EI分类号	482.2 Minerals ; 531 Metallurgy and Metallography ; 531.1 Metallurgy ; 547.1 Precious Metals ; 701.1 Electricity: Basic Concepts and Phenomena ; 702 Electric Batteries and Fuel Cells ; 714.1 Electron Tubes ; 741.3 Optical Devices and Systems ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally ; 931.3 Atomic and Molecular Physics ; 932.3 Plasma Physics ; 941.3 Optical Instruments ; 941.4 Optical Variables Measurements
原始文献类型	Journal article (JA)
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.nwnu.edu.cn/handle/39RV6HYL/34692
专题	机关部门（群众团体）_教务处实体学院_数学与统计学院实体学院_化学化工学院实体学院_化学化工学院_化工系直属单位_学报编辑部实体学院_教师教育学院直属单位_档案馆（博物馆）
通讯作者	Lu Quan-fang
作者单位	1.Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Bioelectrochem & Environm Anal Gansu Prov, Lanzhou 730070, Gansu, Peoples R China; 2.Northwest Normal Univ, Editorial Dept Univ Journal, Lanzhou 730070, Gansu, Peoples R China
第一作者单位	化工系
通讯作者单位	化工系; 学报编辑部
第一作者的第一单位	化工系
推荐引用方式 GB/T 7714	Yu Jie,Zhu Shu-wen,Lu Quan-fang,et al. High Sensitive Determination of Pb and Zn in Refined Copper Ores Samples Using Liquid Cathode Glow Discharge-Atomic Emission Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2018,38(11):3550-3557.
APA	Yu Jie.,Zhu Shu-wen.,Lu Quan-fang.,Zhang Zhi-chao.,Zhang Xiao-min.,...&Yang Wu.(2018).High Sensitive Determination of Pb and Zn in Refined Copper Ores Samples Using Liquid Cathode Glow Discharge-Atomic Emission Spectrometry.SPECTROSCOPY AND SPECTRAL ANALYSIS,38(11),3550-3557.
MLA	Yu Jie,et al."High Sensitive Determination of Pb and Zn in Refined Copper Ores Samples Using Liquid Cathode Glow Discharge-Atomic Emission Spectrometry".SPECTROSCOPY AND SPECTRAL ANALYSIS 38.11(2018):3550-3557.