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Vitamin C DCPIP Quiz

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Vitamin C DCPIP Quiz

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Vitamin C DCPIP test facts

Created by

'AATHIRAH MASSARAH AHMAD SAHIMI
'AATHIRAH MASSARAH AHMAD SAHIMI
Malaysia

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Vitamin C DCPIP Quiz
 

Vitamin C DCPIP QuizOnline version

Vitamin C DCPIP test facts

by 'AATHIRAH MASSARAH AHMAD SAHIMI
1

What color is DCPIP solution before reduction by vitamin C?

2

What happens to DCPIP when vitamin C is present in the sample?

3

Which instrument is commonly used to quantify the vitamin C content in DCPIP assays?

4

What is the purpose of using a blank in the DCPIP assay?

5

Which factor can falsely lower the apparent vitamin C content in a sample?

6

What indicates the reaction is complete in a DCPIP assay?

7

What unit is commonly used to report vitamin C content in foods?

8

How can sample preparation affect assay accuracy?

9

Why is the DCPIP test considered a colorimetric method?

10

Which form of vitamin C is being measured by the DCPIP assay?

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Blue DCPIP is reduced by vitamin C, causing a color change.

Vitamin C reduces DCPIP, changing it from blue to colorless.

A spectrophotometer measures absorbance changes during the reaction.

The blank sets a baseline so absorbance is measured correctly.

Other reducing substances can also reduce DCPIP, skewing results.

Completion is shown by the blue dye turning colorless as it’s reduced.

Most nutritional data express vitamin C as milligrams per 100 grams.

Samples must produce readings within the standard curve range for accuracy.

Concentration is inferred from the observed color change of DCPIP.

The assay targets ascorbic acid as the reducing agent.

 
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