Complete kit for free and total SO2 determination (Ripper method), with an automatic self-zeroing burette engraved and graduated

The free sulphurous anhydride is titrated directly in wine with a titrated iodine solution in the presence of a starch indicator. Subsequently, and on a second sample, the SO2 is released from the combinations it forms thanks to an alkaline solution. Then, the same titration as above is done again and total SO2 is obtained. The difference between the 2 results gives the combined SO2.

The sulphurous anhydride is a dissolved gas, which constantly escapes from liquid. To minimize this loss, it is important to:

• Carefully take the sample, cork it immediately, and keep it at a cool place after analysis.
• Prepare the material and the products before uncorking the sample.
• Quickly measure the sample and proceed immediately to titration.

• Stand, rod, and clamp for burette
• 1 automatic self-zeroing burette with stopcock engraved and graduated (mg/l of SO2) (Ref. 600114)
• 1 automatic bulb for burette (Ref. 606000)
• 1 siphon for ground-joint flask (Ref. 600194)
• Green clip for ground-joint assembly (Ref. 600195)
• 1 VERSILIC hose (diameter 5/7) (Ref. 617602)
• 1 Amber glass ground-joint flask (500ml) (Ref. 600193)
• 1 stopper N°10 (Ref. 650110P)
• 1 graduated ground-joint Erlenmeyer flask (250 ml) (Ref. 615250E)
• 1 2-mark pipette (50ml) (Ref. 603010)
• 1 2-mark pipette (25ml) (Ref. 603025)
• 1 2-mark pipette (10ml) (Ref. 603050)
• 1 dropping pipette with rubber bulb (Ref. 630000)
• Iodine 500ml N/50 (Ref. 936500)
• Sodium hydroxide 500ml 1,125N (Ref. 934500)
• Sulphuric acid 500ml 1/10 (Ref. 932500)
• Indicator 125ml (Ref. 937125)