激光诱导击穿光谱技术对大气气溶胶中Cr元素的检测

量子电子学报 ›› 2020, Vol. 37 ›› Issue (6): 745-751.

激光诱导击穿光谱技术对大气气溶胶中Cr元素的检测

郭旺林1;2, 邱荣1;2, 王昶沣1;2, 王慧丽1;2, 叶成1;2, 吕罗庚1;3

1 西南科技大学极端条件物质特性联合实验室, 四川绵阳621010; 2 西南科技大学理学院, 四川绵阳621010; 3 西南科技大学制造科学与工程学院, 四川绵阳621010

收稿日期:2019-10-22 修回日期:2019-12-01 出版日期:2020-11-28 发布日期:2020-11-28
通讯作者: E-mail: qiurong@swust.edu.cn E-mail:qiurong@swust.edu.cn
作者简介:郭旺林( 1992 - ), 四川成都人,研究生,主要从事激光诱导击穿光谱检测方面的研究。E-mail: 442746871@qq.com
基金资助:
Supported by Joint Fund of National Natural Science Foundation of China and China Academy of Engineering Physics (国家自然科学基金委员会与中国工程物理研究院联合基金, U1530109), National Natural Science Foundation of China (国家自然科学基金, 11972313)

Detection of chromium in atmospheric aerosol by laser induced breakdown spectroscopy

GUO Wanglin1;2, QIU Rong1;2, WANG Changfeng1;2, WANG Huili1;2, YE Cheng1;2, LV Luogeng1;3

1 Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China; 2 School of Science, Southwest University of Science and Technology, Mianyang 621010, China; 3 School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

Received:2019-10-22 Revised:2019-12-01 Published:2020-11-28 Online:2020-11-28

摘要/Abstract

摘要： 大气气溶胶中重金属污染物能够对生态系统甚至人体造成不利影响, 因而对其中重金属污染物进行检测和分析是有必要的。利用激光诱导击穿光谱(LIBS) 技术, 对持续收集20 min 的大气气溶胶进行金属元素的定性分析和有毒重金属的定量分析, 并重点研究了在本实验系统下气溶胶中Cr 元素的LIBS 分析谱线。随后经归一化处理研究了大气气溶胶中Cr 元素强度与中国环监总站公布的PM2.5 和PM10 含量之间的关系, 通过建立重金属元素的定标曲线检测了气溶胶样品中重金属元素的含量, 并计算了相关重金属元素的检测限。实验结果表明, 大气气溶胶中含有Cr、Na、Mg、Al、Ca、Fe、Ba 等金属元素, 其中Cr 元素谱线强度与中国环监总站公布的PM2.5、PM10 数据成正相关, 尤其与PM2.5 数据相关性更好。本实验建立的重金属元素定标曲线相关系数R2 在0:995 0:997 之间, 检测限在1:9 3:6 mg/kg 之间, 表明该方法可以用于快速检测大气气溶胶中的重金属元素含量。

关键词: 光谱学, 快速检测, 激光诱导击穿光谱, 大气气溶胶, 重金属污染

Abstract: Heavy metal pollutants in atmospheric aerosols can adversely affect ecosystem and even human body. Therefore, it is necessary to detect and analyze the heavy metal pollutants in aerosols. Using laser-induced breakdown spectroscopy (LIBS), qualitative analysis of metallic elements and quantitative analysis of toxic heavy metals in atmospheric aerosol collected in 20 minutes were carried out, and LIBS analysis spectrum of Cr in aerosols under this experimental system was mainly studied. Then the relationship between the intensity of Cr in atmospheric aerosols and the contents of PM2.5 and PM10 published by China Environmental Monitoring Station was studied by normalization. Moreover, by establishing the calibration curve of heavy metal elements, the content of heavy metal elements in the aerosol samples was detected, and the corresponding detection limit was calculated. The experimental results show that atmospheric aerosols contain metal elements such as Cr, Na, Mg, Al, Ca, Fe, and Ba, and the intensity of the Cr element line is positively correlated with the PM2.5 and PM10 data published by China National Environmental Monitoring Centre, especially with the PM2.5 data. The correlation coefficient R2 of the calibration curve for heavy metal elements established in this experiment ranges from 0.995 to 0.997, and the detection limit ranges from 1.9 to 3.6 mg/kg, which indicates that the method can be applied for rapid detection of the content of heavy metal elements in atmospheric aerosol.

Key words: spectroscopy, rapid detection, laser-induced breakdown spectroscopy, atmospheric aerosol; heavy metal pollution

中图分类号:

TN249
O433.4

郭旺林, 邱荣, 王昶沣, 王慧丽, 叶成, 吕罗庚, . 激光诱导击穿光谱技术对大气气溶胶中Cr元素的检测[J]. 量子电子学报, 2020, 37(6): 745-751.

GUO Wanglin, QIU Rong, WANG Changfeng, WANG Huili, YE Cheng, LV Luogeng, . Detection of chromium in atmospheric aerosol by laser induced breakdown spectroscopy[J]. Chinese Journal of Quantum Electronics, 2020, 37(6): 745-751.

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