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Recent advances in the spectroscopic characterization of soil humic substances and their ecological relevance
Author(s) -
Fründ Rüdiger,
Guggenberger Georg,
Haider Konrad,
Knicker Heike,
KögelKnabner Ingrid,
Lüdemann HansDietrich,
Luster Jörg,
Zech Wolfgang,
Spiteller Michael
Publication year - 1994
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19941570305
Subject(s) - humus , chemistry , characterization (materials science) , organic matter , soil water , environmental chemistry , fractionation , soil organic matter , dissolved organic carbon , organic chemistry , soil science , materials science , nanotechnology , environmental science
Non destructive spectroscopic methods such as 13 C‐ and 15 N‐NMR provide new insights into the structure of humic substances. Solid state NMR is capable of studying complete native soils by the CPMAS‐technique. By means of nitrogen 15‐enriched composts it is suggested that nitrogen in soil organic matter is mainly located in amide and peptide structures. Most probable assignments are given. The investigation of humification processes in forest soils is possible via an approach which uses several fractionation techniques in combination with degradative and non‐degradative analytical techniques. Besides structure analysis, the 13 C‐NMR‐spectroscopy provides important information about the functions of humic substances. By using 13 C‐enriched xenobiotics the binding mechanism to organic matter can be elucidated on a molecular basis. Molecular fluorescence spectrometry, a non‐invasive method, is a powerful tool for the quantitative characterization of metal ion complexation by dissolved organic matter in aqueous leaf litter extracts in terms of conditional stability constants and metal binding capacities.