土壤粒径大小对蒽荧光特性的影响及校正

发布时间：2018-01-01 00:25

本文关键词：土壤粒径大小对蒽荧光特性的影响及校正　出处：《光学精密工程》2016年11期 　论文类型：期刊论文

【摘要】：为了准确检测土壤中的多环芳烃,以土壤中典型多环芳烃污染物蒽为检测对象,研究了土壤粒径大小对其荧光特性的影响,并提出了一种校正土壤粒径大小对多环芳烃标准曲线影响的方法。研究了蒽在土壤中的荧光特性,指出蒽在421nm、442nm和470nm处出现较强的荧光峰。接着,制备7种不同粒径大小的蒽土壤样品,并以土壤粒径大小为外扰,构建了同步和异步二维相关荧光谱,研究了蒽荧光强度和304nm处瑞利散射光强随土壤粒径大小的变化。结果显示,随着土壤粒径增大,蒽荧光强度和304nm处瑞利散射光强度都有增强。最后,分别建立了80目和160目土壤粒径下定量分析土壤蒽浓度的标准曲线,并通过304nm处瑞利散射光对蒽荧光进行校正。结果表明:该方法有效降低了土壤粒径大小对蒽标准曲线的影响。
[Abstract]:In order to accurately detect polycyclic aromatic hydrocarbons (PAHs) in soil, the effect of soil particle size on the fluorescence characteristics of anthracene, a typical PAHs pollutant, was studied. A method was proposed to correct the effect of soil particle size on the standard curve of PAHs. The fluorescence characteristics of anthracene in soil were studied and it was pointed out that anthracene was at 421nm. There were strong fluorescence peaks at 442 nm and 470 nm. Then, seven anthracene soil samples with different particle sizes were prepared, and the synchronous and asynchronous two-dimensional correlation fluorescence spectra were constructed with soil particle size as external disturbance. The changes of fluorescence intensity of anthracene and Rayleigh scattering light intensity at 304 nm with soil particle size were studied. The fluorescence intensity of anthracene and the Rayleigh scattering intensity at 304 nm were enhanced. Finally, the standard curves for quantitative analysis of soil anthracene concentration were established under the soil particle sizes of 80 and 160 mesh, respectively. The fluorescence of anthracene was corrected by Rayleigh scattering light at 304 nm. The results showed that the influence of soil particle size on anthracene standard curve was reduced effectively.
【作者单位】：天津农学院工程技术学院;天津农学院农业分析测试中心;
【基金】：天津市自然科学基金资助项目(No.14JCYBJC30400,No.14JCYBJC43700) 国家自然科学基金资助项目(No.312901359,No.81471698) 天津市教委科技发展基金资助项目(No.20140621)
【分类号】：X833;O657.3
【正文快照】： (1.College of Engineering and Technology,Tianjin Agricultural University,Tianjin300384,China;2.Laboratory of Agricultural Analysis,Tianjin Agricultural University,Tianjin300384,China)*Corresponding author,E-mail:zhangweiyu@tjau.edu.cn1引言多环芳烃(PAHs)

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