摘要
土壤重金属污染对农作物生长和人体健康都有严重危害,现场快速检测对土壤重金属污染调查、应急监测具有重要意义。采用自主研发的土壤重金属激光诱导击穿光谱现场快速检测仪对矿区周边土壤进行现场检测分析,以835个不同基质土壤的光谱数据建立定标数据库,通过支持向量机建立回归模型对土壤重金属元素含量进行定量反演。现场检测获取的全波段光谱波动在15%以内,Cd、Cr、Cu、Ni、Pb和Zn等6种元素光谱强度相对标准偏差平均值为6.31%。将检测结果与实验室电感耦合等离子体质谱法分析对比,6种元素的皮尔逊相关系数r在0.8501~0.9829,检测结果80%以上处于±30%相对误差区间分布。对比结果表明自主研发的土壤重金属激光诱导击穿光谱现场检测仪可以满足现场快速检测需求。
Heavy metals in soil are dangerous to crop growth and human health,and on-site rapid detection is of great significance for heavy metal investigation and emergency monitoring in soil.The self-developed soil heavy metal on-site rapid detection instrument,which based on laser induced breakdown spectroscopy technology,was used to conduct on-site detection and analysis of the surrounding soil in the mining area.A calibration database was established based on the spectral data of 835 different matrix reference soils,and regression models were established using support vector machine to quantitatively invert the content of heavy metal elements in soil.The full spectral fluctuation obtained on-site detection was within 15%,and the average relative standard deviation of spectral intensity of six elements,including Cd,Cr,Cu,Ni,Pb and Zn,was 6.31%.Compared the detection results with laboratory inductively coupled plasma mass spectrometry analysis,the pearson correlation coefficients(r)of six elements ranged from 0.8501 to 0.9829,and over 80%of the detection results were distributed within the±30%relative error range.The comparative results indicated that the self-developed soil heavy metal detector could meet the needs of rapid on-site detection.
作者
马明俊
方丽
赵南京
韩守炉
陈富强
时晨
MA Mingjun;FANG Li;ZHAO Nanjing;HAN Shoulu;CHEN Fuqiang;SHI Chen(Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;University of Science and Technology of China,Hefei,Anhui 230026,China;Key Laboratory of Optical Monitoring Technology for Environment of Anhui Province,Hefei,Anhui 230031,China;School of Biological Food and Environment,Hefei University,Hefei,Anhui 230601,China;Institute of Physical Science and Information Technology,Anhui University,Hefei,Anhui 230601,China)
出处
《中国无机分析化学》
CAS
北大核心
2024年第2期145-152,共8页
Chinese Journal of Inorganic Analytical Chemistry
基金
国家自然科学基金资助项目(62001453)
中国科学院科技服务网络计划项目(KFJ-STS-QYZD-2021-04-001)。
关键词
激光诱导击穿光谱
便携式
土壤重金属
现场检测
laser-induced breakdown spectroscopy
portable
heavy metals in soil
present rapid detection
