蒸馏-碘滴定法测定红薯蕃茄粉丝中二氧化硫残留

Determination of Sulful Dioxide Residues in the Starch Noodles Including Sweet Potato and Tomato Juice by Distillation and Titration Employing Iodine

采用蒸馏-碘滴定法测定了红薯蕃茄粉丝中二氧化硫残留,精密度在1.3%～1.87%之间。结果表明:粉丝中微量二氧化硫的残留量可以用蒸馏-碘滴定法快速检测。此法操作简单、灵敏度高、重现性好。可用于粉丝中二氧化硫质量控制。

A method for determination of sulful dioxide residues in the starch noodles including sweet potato and tomato juice was introduced,by using the method of distillation and titration employing iodine to determine sulful dioxide residues.The accuracy was 1.3% to 1.87%.The result showed that the sulful dioxide residues in the noodles can be fast determined by distillation and titration employing iodine.The operation was easy operation,and the sensitivity and the accuracy were high.The method can control the quality of sulful dioxide residues in the starch noodles including sweet potato and tomato juice.