SELIWANOFF REAGENT
Seliwanoff's test is used to distinguish aldoses from ketoses. On treatment with a concentrated Acid, ketoses are dehydrated more rapidly to give furfural derivatives and on condensation with resorcinol give cherry red complex. The test will be answered by fructose, sucrose and other keto containing carbohydrates.
Application
Seliwanoff's test is a chemical test which distinguishes between aldose and ketose sugars. If the sugar contains a ketone group, it is a ketose. If a sugar contains an aldehyde group, it is an aldose. This test relies on the principle that, when heated, ketoses are more rapidly dehydrated than aldoses.
Other Names
SELIWANOFF REAGENT for detection of fructose
Procedure
Seliwanoff's test is used to differentiate between sugars that have a ketone group (ketose) and sugars that have an aldehyde group (aldoses). This test is a timed color reaction specific to ketohexoses.
Note
Seliwanoff's test is a chemical test which distinguishes between aldose and ketose sugars. ... If it is a ketose sugar like fructose and sucrose is the solution turns cherry red . If it is a aldose sugar then a faint pink color may appear.