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- [50] Spectrophotometric Determination of Trace Lead in food with Trihydroxyphenylfluorone in Microemulsion after Sulphydryl Dextrane Gel for Preconcentration and Separation 2009 3RD INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICAL ENGINEERING, VOLS 1-11, 2009, : 5751 - 5754