<b>Influence of heating under different titration methods of residual SO₂ on shrimps <em>Litopenaeus vannamei</em> (Boone, 1931)</b> - DOI: 10.4025/actascianimsci.v30i1.3437

Abstract

Sodium metabisulfite is the most applied preservative in shrimp culture, with its use supported by current legislation; however, its residue, sulfur dioxide (SO₂), in high concentrations can provoke adverse health reactions. This study evaluated the influence of heating under different methods of residual SO₂) titration in em>Litopenaeus vannamei. Shrimps were treated with nine concentrations of sodium metabisulfite and evaluated by different methods of SO₂) titration. The adapted Adolfo Lutz titration method presented the highest sensitivity for the detection of SO₂). The method of iodometric titration with heating made possible the detention of higher levels of SO₂), when compared to the same method without heating. The heating influenced negatively on the reactive ribbon method. It is concluded that the heating influenced positively on the iodometric titration, as opposed to the reactive ribbon.