what is the function of baso4 reagent in limit test?
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Limit test of sulphate is based on the reaction of soluble sulphate with barium chloride in presence of alcohol and potassium sulphate to form barium sulphate, which appears as solid particles (turbidity) in the solution. Here alcohol is added to prevent super saturation.
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Barium sulphate reagent contains • Barium chloride, • Sulphate Free Alcohol • Potassium Sulphate in Water. 14. Potassium sulphate is used to increase the sensitivity of the test. It react with the barium chloride and forms barium sulphate in small quantity which will act as a seeding agent.
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