Determination of organic acids and phosphate in soil aqueous extracts by capillary zone electrophoresis

1999 ◽  
Vol 30 (1-2) ◽  
pp. 213-220 ◽  
Author(s):  
I. Ahumada ◽  
J. Mendoza ◽  
L. Ascar
Keyword(s):  
Organic Acids ◽  
Capillary Zone Electrophoresis ◽  
Aqueous Extracts ◽  
Zone Electrophoresis ◽  
Capillary Zone

Simultaneous determination of organic acids in beverages by capillary zone electrophoresis

2006 ◽  
Vol 565 (2) ◽  
pp. 190-197 ◽  
Author(s):  
Inés Mato ◽  
José F. Huidobro ◽  
Jesús Simal-Lozano ◽  
Ma Teresa Sancho
Keyword(s):  
Organic Acids ◽  
Simultaneous Determination ◽  
Capillary Zone Electrophoresis ◽  
Zone Electrophoresis ◽  
Capillary Zone

scholarly journals Determination of Organic Acids of Low Molecular Weight and Phosphate in Soil by Capillary Electrophoresis

2001 ◽  
Vol 84 (4) ◽  
pp. 1057-1064 ◽  
Author(s):  
Ines Ahumada ◽  
Jorge Mendoza ◽  
Paula Escudero ◽  
Katerina Mossert ◽  
Loreto Ascar
Keyword(s):  
Organic Acids ◽  
Low Molecular Weight ◽  
Aqueous Extracts ◽  
Tetradecyltrimethylammonium Bromide ◽  
Indirect Uv Detection ◽  
Zone Electrophoresis ◽  
Capillary Zone ◽  
High Concentrations ◽  
Support Electrolyte Solution

Abstract Capillary zone electrophoresis with indirect UV detection at 254 nm was found to be suitable for the determination of organic acids and phosphate in aqueous extracts of soil. The best support electrolyte solution was found to be 10mM p-hydroxybenzoic acid with 0.5mM tetradecyltrimethylammonium bromide to reverse electroosmotic flow. This methodology was tested with 9 analytes found in soils: acetate, citrate, formate, phosphate, lactate, oxalate, pyruvate, succinate, and tartrate. The results obtained show that the methodology is adequate for most of the analytes. The sensitivity to oxalate and citrate was low, and the high concentrations of major inorganic anions interfered with the detection of the former. The methodology was applied to the analysis of aqueous extracts of soil samples. Formate, phosphate, lactate, and acetate anions were detected in most of the samples.

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