Lima, M. J. ReisFernandes, S.M.V.Rangel, António O. S. S.2011-10-222011-10-222002LIMA, M. J. Reis; FERNANDES, S. M. V.; RANGEL, A. O.S.S. - Colorimetric determination of phosphorus in milk by flow injection analysis using a thermal/uv induced digestion. Italian Journal of Food Science. ISSN 1996-2010. Vol. 14, n.º 1 (2002), p. 9-16http://hdl.handle.net/10400.14/6849Two flow injection systems for the determination of total phosphorus in milk were developed: one for the determination of phosphorus using offline digestion of milk and another with in-line digestion. The first procedure involves a classical Kjeldahl digestion of milk prior to introducing it into the flow system; the second uses acid, heat and UV-catalysed peroxodisulphate oxidation to convert in-line all forms of phosphorus compounds into orthophosphate, allowing a considerable amount of time to be saved. Concentrations of phosphorus in milk withinthe range of 706 to 984 mg P/L were found and FIA results were in good agreement with those provided by the reference method.engjournal article