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Titolo:
DETERMINATION OF ORGANIC-ACIDS IN SOIL EXTRACTS BY ION CHROMATOGRAPHY
Autore:
BAZIRAMAKENGA R; SIMARD RR; LEROUX GD;
Indirizzi:
AGR & AGRIFOOD CANADA,SOIL & CROPS RES CTR,2560 HOCHELAGA BLVD ST FOYPQ G1V 2J3 CANADA AGR & AGRIFOOD CANADA,SOIL & CROPS RES CTR ST FOY PQ G1V 2J3 CANADA UNIV LAVAL,DEPT PHYTOL ST FOY PQ G1K 7P4 CANADA
Titolo Testata:
Soil biology & biochemistry
fascicolo: 3, volume: 27, anno: 1995,
pagine: 349 - 356
SICI:
0038-0717(1995)27:3<349:DOOISE>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; PHENOLIC-COMPOUNDS; CARBOXYLIC-ACIDS; PLANT-ROOTS; LEAF LITTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
R. Baziramakenga et al., "DETERMINATION OF ORGANIC-ACIDS IN SOIL EXTRACTS BY ION CHROMATOGRAPHY", Soil biology & biochemistry, 27(3), 1995, pp. 349-356

Abstract

Low molecular-weight organic acids play a determinant role in nutrient cycling and plant growth in agricultural and forest ecosystems. Our study was made to develop a sensitive method to identify and quantify organic acids in soil extracts from the rhizosphere of quackgrass grown under greenhouse conditions. The procedure involves ion-exchange chromatographic separation using step gradient, and quantification by UV absorption for aromatic acids and by conductivity for aliphatic acids. In a single chromatographic run, 14 aliphatic acids were separated in55 min and 14 aromatic acids in 25 min. The methods have high precision with relative standard deviations of peak areas ranging from 1.50 to 7.99% for aliphatic acids and from 0.65 to 6.37% for aromatic acids. The method for aliphatic acids is recommended for mono- or dicarboxylic acid analysis, whereas the method for aromatic acids constitutes a major improvement over previous procedures. We identified 13 organic acids in the quackgrass rhizosphere and 18 organic acids in soil containing decomposing residues of this plant. The largest concentrations were found in soils containing quackgrass residues. Aliphatic acid concentrations were generally larger than those of aromatic acids. Formic and acetic acids dominated the aliphatic group, whereas benzoic and p-hydroxybenzoic acids were found in largest amounts among aromatic acids.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 19:12:49