I recently purchased a sulfite testing kit (not titrets) and will be practicing with it soon and will post results. The big trick to testing red wine is to see the color change for an accurate result. I have acquired some equipment that should make this work well.
The procedure is the Iodometric Method, also known as the Ripper Method. It is based on the reaction of the free sulfite with potassium iodine-iodate standard.
The procedure is the Iodometric Method, also known as the Ripper Method. It is based on the reaction of the free sulfite with potassium iodine-iodate standard.