Journal of Chromatography A 2000-11-03

Extraction of cloransulam-methyl from soil with subcritical water and supercritical CO2.

M S Krieger, J L Wynn, R N Yoder

Index: J. Chromatogr. A. 897(1-2) , 405-13, (2000)

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Abstract

Cloransulam-methyl was extracted from soil samples with supercritical CO2, subcritical water and conventional organic solvents. Supercritical CO2 was less efficient than conventional organic solvents; polarity modifiers had no impact on extraction efficiency. Extraction with supercritical CO2 exhibited a strong temperature dependence. Water was as effective as strong organic solvents for the extraction of cloransulam-methyl; however cloransulam-methyl hydrolyzed when extracted at 150 degrees C. Extraction temperature was the most important variable in increasing the efficiency and rate of extraction, while extraction pressure was not a significant variable.