Phenol index with 4-aminoantipyrine without extraction after steam distillation

2 Phenol index with 4-aminoantipyrine without extraction after steam distillation 

Phenol-type substances, and also certain other compounds capable of coupling react with 4-aminoantipyrine, to produce - in alkaline reaction 

Care should be taken to ensure that chlorinated water is treated with ascorbic acid all other possible causes of interference are eliminated by 

Dissolve 34 g ammonium chloride and 200 g sodium potassium tartrate in approx. 700 ml distilled water, add 130 ml ammonium hydroxide solution (0.91 g/1) and make up to 1 litre. 

Dissolve 2 g of 4-amino-2,3-dimethyl-l-phenyl-3-pyrazoline-3-one in 100 ml water. This solution must be freshly prepared every day. 

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Phenol index, with 4-aminoantipyrine after extraction with and without steam distillation... 

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