基于电沉积富集-LIBS的水中Cd元素高灵敏稳定测量研究

doi:10.3969/j.issn.1673-6141.2024.03.004

大气与环境光学学报 ›› 2024, Vol. 19 ›› Issue (3): 314-321.doi: 10.3969/j.issn.1673-6141.2024.03.004

基于电沉积富集-LIBS的水中Cd元素高灵敏稳定测量研究

疏阳 1,2,3, 方丽 1,3, 马明俊 1,2,3, 孟德硕 1,3, 赵南京 1,3*

1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院环境光学与技术重点实验室, 安徽合肥 230031; 2 中国科学技术大学, 安徽合肥 230026; 3 安徽省环境光学监测技术重点实验室, 安徽合肥 230031

收稿日期:2021-05-17 修回日期:2021-07-23 出版日期:2024-05-28 发布日期:2024-06-11
通讯作者: E-mail: njzhao@aiofm.ac.cn E-mail:njzhao@aiofm.ac.cn
作者简介:疏阳 (1997- ), 安徽桐城人, 硕士研究生, 主要从事水体重金属LIBS测量方法研究。 E-mail: yshu@aiofm.ac.cn
基金资助:
国家自然科学基金 (21735005, 62001453) 安徽省重点研究和开发计划 (201904a07020089)

Highly sensitive and stable measurement of Cd in water based on electrodeposition enrichment-LIBS technology

SHU Yang 1,2,3, FANG Li 1,3, MA Mingjun 1,2,3, MENG Deshuo 1,3, ZHAO Nanjing 1,3*

1 Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China; 3 Key Laboratory of Optical Monitoring Technology for Environment, Anhui Province, Hefei 230031, China

Received:2021-05-17 Revised:2021-07-23 Online:2024-05-28 Published:2024-06-11
Contact: Nan-jing Nan-jingZHAO E-mail:njzhao@aiofm.ac.cn
Supported by:
National Nature Science Foundation of China;National Nature Science Foundation of China

摘要/Abstract

摘要： 针对水体痕量Cd元素的高灵敏稳定检测，基于Al 片电沉积富集 (ED) 结合激光诱导击穿光谱 (LIBS) 检测的 ED-LIBS水中Cd分析方法，实验研究了富集时间、富集电压、导电溶质KCl 浓度以及电极表面砂纸打磨对Cd元素富集结果的影响。结果表明，经砂纸打磨Al 片电沉积富集后， Cd元素富集稳定性得到提升，同时优化确定的富集电压、富集时间和KCl 浓度分别为−2.4 V、1200 s 和2 g/L。利用该方法， Cd 元素检测限和相对标准偏差分别为0.0021 mg/L 和 3.30%，满足《生活饮用水卫生标准》指标检测需求，为水体中痕量Cd元素的高灵敏稳定分析提供了有力的检测手段。

关键词: 电沉积富集, 激光诱导击穿光谱, 水体重金属, 高灵敏稳定测量

Abstract: Aiming at the highly sensitive and stable detection of trace amounts of Cd2+ in water, an
experimental study based on Al sheet electrodeposition enrichment (ED) combined with laser-induced
breakdown spectroscopy (LIBS) to detect Cd in water analysis method (ED-LIBS) is carried out. The
effects of enrichment time, enrichment voltage, concentration of conductive solute KCl, and sandpaper
polishing on the electrode surface, on Cd element enrichment are analyzed. The result shows that the
enrichment stability of Cd element is improved after the Al flakes for electrical-deposition being polished by sandpaper. The optimized enrichment voltage, enrichment time and concentration of KCl are −2.4 V,
1200 s and 2 g/L, respectively. By using the proposed method, the detection limit and relative standard
deviation of Cd element are 0.0021 mg/L and 3.30%, respectively, which meets the detection requirement
of "Sanitary Standards for Drinking Water" and provides an optional method for the highly sensitive and
stable analysis of trace Cd elements in water.

Key words: electrical-deposition enrichment, laser-induced breakdown spectroscopy, heavy metals in water, highly sensitive and stable measurement

中图分类号:

O433.4

疏阳, 方丽, 马明俊, 孟德硕, 赵南京, . 基于电沉积富集-LIBS的水中Cd元素高灵敏稳定测量研究[J]. 大气与环境光学学报, 2024, 19(3): 314-321.

SHU Yang , FANG Li , MA Mingjun , MENG Deshuo , ZHAO Nanjing , . Highly sensitive and stable measurement of Cd in water based on electrodeposition enrichment-LIBS technology[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(3): 314-321.

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基于电沉积富集-LIBS的水中Cd元素高灵敏稳定测量研究

Highly sensitive and stable measurement of Cd in water based on electrodeposition enrichment-LIBS technology

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