Best Answer

When an unknown sample is added to the decolorized Schiff's reagent and an aldehyde is present, a magenta of purple color develops.


User Avatar

Wiki User

13y ago
This answer is:
User Avatar
More answers
User Avatar


3d ago

A positive Schiff's test is recognized by a color change from colorless to pink or magenta in the presence of aldehydes, specifically ketoses like fructose. The test relies on the reaction between the aldehyde and the reagent, causing the formation of a colored product.

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How is a positive Schiff's test recognized?
Write your answer...
Still have questions?
magnify glass
Related questions

Equation of formaldehyde schiff's reagent benzaldehyde schiff's reagent and acetone schiff's reagent?

Formaldehyde Schiff's reagent: It is a solution of formaldehyde and sulfuric acid, used to detect the presence of aldehydes. The equation involves the formation of a colored compound with aldehydes. Benzaldehyde Schiff's reagent: Benzaldehyde can act as a Schiff's base with primary amines to form imines. The reaction results in the formation of a colored compound. Acetone Schiff's reagent: Acetone can react with a primary amine to form a Schiff's base, leading to the formation of a colored compound.

What drugss will Adderall test positive for?

Adderall will test positive for amphetamine. It is an amphetamine therefore it will test positive for such.

How do you decolourise schiffs reagent?

With periodic acid during the steps of staining slides.

What is the molecular formula of schiff reagent?

The molecular formula of Schiff reagent is C20H15N3. It is a chemical reagent used for detecting the presence of aldehydes or ketones in organic compounds.

Will xanex test positive for methanphetamine on a urine test?

Will test positive for Benzodiazepines

What are the test to confirmed into positive of tuberculosis?

if montoux test is positive

What is false positive widal test?

What is false positive in widal test

Does cyclobenzaprine test positive to cocaine?

does cyclobenzaprine test positive for cocaine?

Did a pregnancy test was positive. went to docs was negative. Doc said that the test could have shown up positive if sperm was present at the time of the test. is this true?

There is no false positive pregnancy test result. If it has ever been positive, then it is positive.

Will you test positive on a redi test nicotine test if you are wearing patches?

will you test positive for oxycontin and opiates if you are taking both

Can your test come out positive then negative?

If it's a pregnancy test the answer is no, A test can come back negative even though its positive. But if it's positive, it's positive 99% of the time.

Can a positive pregnancy test turn negative?

No , but a negative test can be a false positive .