Applications of Raman and surface-enhanced Raman scattering techniques to humic substances

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	Applications of Raman and surface-enhanced Raman scattering techniques to humic substances
	Yang, YH ; Chase, HA
刊名	SPECTROSCOPY LETTERS
	1998
卷号	31 期号:4 页码:821-848
关键词	Humic Acid Fulvic Acid Backbone Methylation Raman Ft-raman Surface-enhanced Raman Scattering (Sers)
ISSN号	0038-7010
英文摘要	This paper highlights the use of Raman, FT-Raman and surface-enhanced Raman scattering (SERS) techniques for the study of humic substances. In contrast to other technologies which reveal information only about the average compositions and the kinds of functional groups present in humic substances, Raman and especially FT-Raman spectroscopies characterize the building blocks of humic substances and their changes in derivation and separation processes. Furthermore, surface-enhanced Raman scattering (SERS) techniques are able to readily detect humic substances and co-existing organic species at low concentrations typically found in natural environments and reveal definitive information about the specific groups in humic substances that bind on metal electrodes. Further applications of both Raman and SERS techniques can be extended to complicated systems as well as real environmental samples. Experiments have demonstrated: (1). the backbones of humic substances are structurally disordered carbon networks in most cases; (2). The backbones of humic substances from different sources and types are similar to each other: (3). Normal Raman spectroscopic study of humic substances should concentrate on the use of near-IR laser(s) resulting from strong fluorescence background and self-adsorption under the excitation with visible laser irradiation; (4). FT-Raman spectroscopy is the required analytical method to assess the effectivity of fractionation methods; (5). SERS spectra of humic substances on metal colloids and films are in most aces very similar to the corresponding Raman spectra of neutralized samples; (6). SERS techniques are very sensitive and highly selective, also both visible lasers and near-IR lasers can be used for SERS study; (7). SERS spectra on metal electrodes may provide additional information about the binding sites and adsorption mechanisms of humic substances on metal surfaces.
语种	英语
出版者	MARCEL DEKKER INC
WOS记录号	WOS:000074142000012
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/74587]
专题	中国科学院化学研究所
通讯作者	Yang, YH
作者单位	1.Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, England 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Yang, YH,Chase, HA. Applications of Raman and surface-enhanced Raman scattering techniques to humic substances[J]. SPECTROSCOPY LETTERS,1998,31(4):821-848.
APA	Yang, YH,&Chase, HA.(1998).Applications of Raman and surface-enhanced Raman scattering techniques to humic substances.SPECTROSCOPY LETTERS,31(4),821-848.
MLA	Yang, YH,et al."Applications of Raman and surface-enhanced Raman scattering techniques to humic substances".SPECTROSCOPY LETTERS 31.4(1998):821-848.