Food tests

studied byStudied by 0 people
0.0(0)
Get a hint
Hint

what do you uses to test for sugar ?

1 / 14

flashcard set

Earn XP

Description and Tags

ocr biology food test with the reason and hazards

15 Terms

1

what do you uses to test for sugar ?

Benedict's test is used to detect sugars

New cards
2

Explanation of Benedict solution ?

Reducing sugars react with Benedict's solution, like glucose, producing a red-brown precipitate. The color may vary depending on the presence of glucose, with green, yellow, or orange being more common.

New cards
3

what are the hazards/saftey call of Benedict solution ?

  • Wear safety goggles.

  • Benedict's solution is an irritant.

  • Avoid contact with skin and eyes.

  • Take care when heating in a boiling water bath.

New cards
4

what do you uses to test for starch ?

Add iodine solution to the food being tested.

New cards
5

Explanation of iodinne solution ?

Foods containing starch will turn a blue-black colour.

The iodine test can also be used with a microscope to stain starch grains in plant cells.

New cards
6

what are the hazards/saftey call of iondine solution ?

  • Wear safety goggles.

  • Iodine solution is an irritant.

  • Avoid contact with skin and eyes.

New cards
7

what do you uses to test for protiens ?

The biuret test is used to detect peptide bonds in proteins.

New cards
8

Explanation of iodinne ?

Add Biuret solution A to a solution of the food being tested and mix carefully. Then trickle a little Biuret solution B down the side of the tube. Look for a purple colouration where the solutions meet.

Biuret reagent is sometimes available as a single solution.

New cards
9

what are the hazards/saftey call of Biuret solution ?

  • Wear safety goggles.

  • Biuret solution A is corrosive.

  • Biuret solution B is an irritant.

  • Avoid contact with skin and eyes.

New cards
10

what do you uses to test for fats ?

The Sudan III test is used to test detect lipids

New cards
11

Explanation of Sunda III ?

One common test for the presence of lipids is the Sudan III test, which involves adding a small amount of Sudan III stain to the unknown solution and observing for a red color change. hence will inform of the presence of lipids.

New cards
12

what are the hazards/saftey call of Sunda III solution ?

Hazards
  • Wear safety goggles.

  • Sudan III solution is flammable as it is dissolved in alcohol.

  • Avoid contact with skin and eyes.

New cards
13

what do you uses to test for lipids ?

The emulsion test is an alternative test for lipids. using Ethonal and water.

New cards
14

Explanation of ethonal and water ?

To test for the presence of lipids, you would carry out the emulsion test. To do this, you take the sample and mix it with equal volumes of ethanol and water followed by shaking. A cloudy white emulsion will form if lipids are present. If lipids are absent, no emulsion will form.

New cards
15

what are the hazards/saftey call of ethonal and water ?

  • Wear safety goggles.

  • Ethanol is flammable.

  • Avoid contact with skin and eyes.

New cards

Explore top notes

note Note
studied byStudied by 52 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 12 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 8019 people
Updated ... ago
4.8 Stars(38)
note Note
studied byStudied by 4 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 45 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 790 people
Updated ... ago
4.0 Stars(1)
note Note
studied byStudied by 14 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 328 people
Updated ... ago
5.0 Stars(2)

Explore top flashcards

flashcards Flashcard39 terms
studied byStudied by 2 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard29 terms
studied byStudied by 3 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard31 terms
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard40 terms
studied byStudied by 298 people
Updated ... ago
4.8 Stars(5)
flashcards Flashcard30 terms
studied byStudied by 123 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard51 terms
studied byStudied by 7 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard351 terms
studied byStudied by 1 person
Updated ... ago
5.0 Stars(1)
flashcards Flashcard30 terms
studied byStudied by 25 people
Updated ... ago
5.0 Stars(1)