胶州湾沉积物中4种重金属含量的可见-近红外光谱分析

Visible-Near Infrared Spectroscopic Analysis of Four Heavy Metal Contents in Sediments From Jiaozhou Bay

可见-近红外反射光谱技术具有检测速度快、操作简单、无污染等显著优势,已被广泛应用于多个领域并为这些领域的信息化发展发挥了重要作用。在沉积物多参数光谱速测方面,可见-近红外反射光谱技术也显示出巨大的应用潜力。根据胶州湾沉积物中化学成分之间的相关性,发现有机碳和四种重金属(As、Cr、Cu、Zn)之间存在着高相关性。基于该研究成果,对胶州湾沉积物中4种重金属(As、Cr、Cu、Zn)含量进行了可见-近红外光谱分析,比较了不同处理方法对结果的影响。结果显示,利用可见-近红外光谱分析方法,能够准确、快速预测胶州湾沉积物中As、Cr、Cu、Zn的含量,RPD高达2.59,R^(2)高达0.85。

The visible near infrared reflectance spectrum characteristics and spectral analysis of heavy metals were studied by searching for substances with high correlation with heavy metals in the sediments of Jiaozhou Bay.Through the combination of four pretreatment methods,two feature extraction methods and two models,the optimal prediction strategy of heavy metals in Jiaozhou Bay sediments was established.The results show that visible near infrared reflectance spectroscopy can be used to rapidly and accurately predict heavy metals in Jiaozhou Bay sediments.