Practical investigations
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I am doing an investigation on the ethanol content of wine. One of the methods I am using to obtain the ethanol content of wine is the distillation/oxidation method. I was hoping to use sodium diphenylamine sulphonate. However this is not available to me at school and I was wondering if any other indicators were suitable to use in the redox titration?
Igloo writes
After carrying out research on the internet you may well find that other indicators can be used in this titration, but I am certain that any alternatives will be even more obscure than sodium diphenylamine sulphonate. If you cannot persuade your school or college to purchase a small quantity for you, then you will need to abandon your plans and use another analytical method, e.g. the one based on densities (see our tutorial on Investigating wines (look at the bit about alcohol content).
Always carry out a risk assessment and check with your teacher before starting any practical work.
Risk assessment
Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in authority in your school or college laboratory. Do not rely on what is said on this website.
For further guidance see our tutorial on Risk Assessment.
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updated: 24 February 2006
