Surface-enhanced Raman and fluorescence joint analysis of soil humic acids

Soil Chemical Insights Provided through Vibrational Spectroscopy

“…Examples of these applications include: characterization of carbon in soil (Corrado et al, 2008;Francioso et al, 2000Francioso et al, , 2001Francioso et al, 1996); investigation of humic binding mechanisms (Corrado et al, 2008;Francioso et al, 2001;Francioso et al, 1996;Leyton et al, 2008;Liang et al, 1999;Sánchez-Cortés et al, 1998;Sanchez-Cortes et al, 2006;Vogel et al, 1999;Yang and Wang, 1997;Yang and Chase, 1998). In a series of studies, Francioso et al successfully used SERS to study different molecular weight humic and fulvic acids extracted from Irish peat using silver as the metal coating.…”

“…d Yang and Chase (1998). e Yang and Wang (1997 Humic binding mechanisms have also generated several SERS studies (Corrado et al, 2008;Leyton et al, 2008;Liang et al, 1999;Roldán et al, 2011;Sánchez-Cortés et al, 1998;Sanchez-Cortes et al, 2006;Vogel et al, 1999;Yang and Chase, 1998). In a recent study, Roldán et al (2011) utilized SERS and surface-enhanced fluorescence to investigate the interaction of humic acids extracted from a soil amended for over 30 years with cattle manure, cow slurries, crop residues, and a control sample with the herbicide paraquat (1,1′-dimethyl-4,4′-bipyridinium).…”

“…Zn) in soil (Szabó et al, 2011). Several reviews and texts discussing the technique and its application have been written in recent years (Campion and Kambhampati, 1998;Corrado et al, 2008;Etchegoin and Le Ru, 2010;Huang et al, 2010;Katrin et al, 2002;Lombardi and Birke, 2009;Moskovits, 2005;Otto et al, 1992;Stiles et al, 2008).…”

“…For a more detailed account of the history of Raman spectroscopy, readers are directed to Ferraro (1967). Novel techniques such as surface-enhanced Raman spectroscopy (SERS) and confocal Raman microspectroscopy have elevated the importance of Raman spectroscopy in the field of soil chemistry (Corrado et al, 2008;Dickensheets et al, 2000;Francioso et al, 2001;Leyton et al, 2008;Sanchez-Cortes et al, 2006;Szabó et al, 2011;Vogel et al, 1999;Xie and Li, 2003;Yang and Chase, 1998).…”

“…Several studies have applied SERS to the characterization of humic acids in soil (Corrado et al, 2008;Francioso et al, 2000Francioso et al, , 2001Francioso et al, , 1996Liang et al, 1996;Vogel et al, 1999), including the effect of pH on humic acid structure at different pH values. In a series of studies, Francioso et al were the first to successfully utilize SERS to ascertain structural and conformational characteristics of humic acids extracted from peat (Francioso et al, 1996).…”