Understanding Fehling's Test for Sugars

To detect the presence of proteins

To identify reducing sugars

To measure pH levels

To test for the presence of lipids

Fructose

Sucrose

Starch

Lactose

To act as a catalyst

To stabilize the solution

To provide alkaline conditions

To act as a reducing agent

To act as a reducing agent

To provide alkaline conditions

To act as a catalyst

To chelate copper ions

Sodium potassium tartrate

Sodium chloride

Sodium hydroxide

Copper sulfate

Yellow to orange

Blue to reddish-brown

Colorless to pink

Blue to green

By adding more Fehling's reagent

By diluting the sample

By heating the solution

By hydrolyzing them with dilute acid

Robert Koch

Hermann von Fehling

Louis Pasteur

Stanley Rossiter Benedict

Fehling's test is more stable

Benedict's test is used for lipids

Benedict's test is more stable and convenient

Fehling's test is used for proteins

Presence of glucose in blood

Presence of glucose in urine

Absence of glucose in blood

Absence of glucose in urine