Trace tantalum can be quantitatively extracted into benzene with tri-iso- octylamine (TIOA) from aqueous solution of 0.4N HF-1.3 N HN03. The opti- mum conditions for Ta-phenylfluorone-tartaric-CTAB complex formation have been studied. The lower determination limit is approximately 0.025 ppm of Ta. ε=1.38 105. The calibration curve for Ta is linear within a range of 0-5 ug/10 ml.