Abstract
A methyl benzoate extraction procedure was studied for determining small amounts of phenol compounds in waste in the 4-aminoantipyrine spectrometry. The proposed procedure was as sensitive as the typical chloroform extraction procedure. The precision of repeated tests (n = 4) was ca. 0.7% on phenol solution (0.20 μg as phenol/mL). The detection limit was 0.004 μg as phenol/mL. Good results were obtained in recovery tests using both waste water and river water.
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