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  • Title: Comparison and critical evaluation of six published extraction and clean-up procedures for aflatoxin M1 in liquid milk.
    Author: Shepherd MJ, Holmes M, Gilbert J.
    Journal: J Chromatogr; 1986 Feb 28; 354():305-15. PubMed ID: 3084526.
    Abstract:
    A practical evaluation has been carried out of six previously published extraction and clean-up methods for aflatoxin M1 in liquid milk. The procedures evaluated incorporated the most widely used stages of clean-up including solvent extraction and silica gel chromatographic clean-up, selective solvent extraction of the extracted residue, the use of deproteination prior to hydrophilic column liquid-liquid partition or solvent extraction and the use of pre-packed reversed-phase cartridges for the direct extraction of aflatoxin M1 from the milk. Analysis times for each method, recoveries and relative costs are reported together with fluorescence high-performance liquid chromatography chromatograms, obtained under identical conditions to compare the relative cleanliness of the final extracts produced by each method. A pre-packed reversed phase cartridge method was shown to be the most satisfactory in terms of speed, cost and cleanliness of the final residue.
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