Chromatographic Determination of the Anion Content in Spanish Rectified Concentrated Musts

¹ University of Castilla-La Mancha, Ciudad Real, Spain
² Polytechnic University of Valencia, Camino de Vera s/n, 46071 Valencia, Spain.

The content of major anions in rectified concentrated must (RCM) has been determined by means of ion chromatography and a conductivity detector. Inorganic anions in Spanish RCM were simultaneously analyzed (Cl^-, 3 - 17 mg/kg sugar; HPO₄^2-, 0 - 1 mg/kg sugar; SO₄^2-, 0 - 5.6 mg/kg sugar). Recoveries (%) of the different anions in the studied media vary in the range 96.5 to 102.7. The content of anions in other products (commercial refined sugar and sulfited must) has also been evaluated. Refined sugar has a higher content of anions than RCM, especially oxalate (7.5 mg/kg sugar) and nitrate (4.5 mg/kg sugar). The studied anions occur in sulfited musts at very high concentrations.

Key words: inorganic anions, rectified concentrated must, ion chromatography

Submitted on September 27, 1991