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Supercritical Fluid Extraction of Aflatoxin B 1 from Soil
Citation:
STARR, J. M. AND M. I. Selim. Supercritical Fluid Extraction of Aflatoxin B 1 from Soil. JOURNAL OF CHROMATOGRAPHY A. Elsevier Science Ltd, New York, NY, 1209(1-2):37-43, (2008).
Impact/Purpose:
The National Exposure Research Laboratory′s (NERL) Human Exposure and Atmospheric Sciences Division (HEASD) conducts research in support of EPA′s mission to protect human health and the environment. HEASD′s research program supports Goal 1 (Clean Air) and Goal 4 (Healthy People) of EPA′s strategic plan. More specifically, our division conducts research to characterize the movement of pollutants from the source to contact with humans. Our multidisciplinary research program produces Methods, Measurements, and Models to identify relationships between and characterize processes that link source emissions, environmental concentrations, human exposures, and target-tissue dose. The impact of these tools are improved regulatory programs and policies for EPA.
Description:
This research describes the development of a Supercritical Fluid Extraction (SFE) method to recover aflatoxin B1 from fortified soil. The effects of temperature, pressure, modifier (identity and percentage), and extraction type were assessed. Using the optimized SFE conditions, the mean recovery from air dried soil was 72%. The variables associated with changes in recovery of aflatoxin B1 were co-solvents, static extraction, and temperature. The results indicate that desorption from the soil was the limiting factor in recovery and that the static phase was more important than the dynamic.
