Abstract
Sulphur dioxide can be determined at a sampling rate of 120 h −1, with amperometric detection after separation in a diffusion cell with a teflon membrane. At 25°C, the calibration graph shows two linear ranges, between 0.06 and 6 mg l −1 and 12 and 110 ml l − sulphur dioxide, with a detection limit of 0.03 mg l −1. At 50°C, the liner range is 04–5 mg l −1, with a detection limit of mg of l −1. The procedure has been applied to the determination of sulphur dioxide in wines.
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