科研之友
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摘要
O metabissulfito de s車dio 谷 o conservante mais aplicado na carcinicultura, com uso amparado em legisla es vigentes no pa赤s, todavia, seu res赤duo, di車xido de enxofre (SO2), em concentra es altas, pode provocar rea es adversas 角 sa迆de. Este estudo foidesenvolvido com a finalidade de observar a influ那ncia do aquecimento sob diferentes m谷todos de titula o de SO2 residual em camar es Litopenaeus vannamei. Os camar es foram submetidos a nove concentra es de metabissulfito de s車dio e avaliados com diferentesm谷todos de detec o de SO2. O m谷todo da titula o Adolfo Lutz adaptado apresentou grande sensibilidade para detec o de SO2 residual. O m谷todo da titula o iodom谷trica com aquecimento possibilitou a detec o de maiores n赤veis de SO2, quando comparado aom谷todo sem o aquecimento. O aquecimento interferiu negativamente no m谷todo da fita reativa. Conclui-se que o aquecimento influenciou positivamente a titula o iodom谷trica, n o ocorrendo o mesmo com a fita reativa. 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 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 ofhigher 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.
