Determination of sulphosuccinic acid and fatty amine from alkylsulphosuccinamates

2 Determination of sulphosuccinic acid and fatty amine from alkylsulphosuccinamates 

After transferring the solution to a separating funnel, neutralise to phenolphthalein with 5M sodium hydroxide, then add 10 ml excess. (Caution the solution will become hot during neutralisation. Add the alkali a little at a time, with continuous cooling.) 

Extract the fatty amine with petroleum ether. Keep the aqueous layer. 

Evaporate the petroleum ether extract to dryness, cool and weigh the fatty amine. If required, dissolve the fatty amine in ethanol and titrate 

Neutralise the aqueous layer to phenolphthalein and make just alkaline. 

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