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For liquids
Add 2cm(cube) of ethanol to a few drops of the unknown substance in a test tube
Shake well
Add 2cm(cube) of water to the test tube
A Positive result will result in a cloudy white suspension forming at the top of the solution.
For solids
Cut sample into a few pieces and place them in a test tube
Add 2cm(cube) of ethanol and shake it thoroughly.
Allow solid to settle and decant ethanol into another test tube
Add 2 cm(cube) of water to the new test tube
A Positive result will result in a cloudy white suspension forming at the top of the solution.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoProteins: use Biuret Reagent Solution. If it turns either pink or purple the food contains protein.
Lipids: Use a brown paper bag and place the foods on it. If they make a spot on the bag that is translucent, the food contains lipids.
Fats:
For liquids
Add 2cm(cube) of ethanol to a few drops of the unknown substance in a test tube
Shake well
Add 2cm(cube) of water to the test tube
A Positive result will result in a cloudy white suspension forming at the top of the solution.
For solids
Cut sample into a few pieces and place them in a test tube
Add 2cm(cube) of ethanol and shake it thoroughly.
Allow solid to settle and decant ethanol into another test tube
Add 2 cm(cube) of water to the new test tube
A Positive result will result in a cloudy white suspension forming at the top of the solution.
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How do you do a food test for fat?
By using Emulsion Test
How do you test in food for fat?
You will look in the back of the bag or box and you will see:-)
What is a method to test for fat in a food?
One method is to take the food, get a piece of paper and rub your food on the piece of paper. Hold the paper up to the light and if it is partly translucent the food has fat in it. If you are not satisfied with your result, try rubbing the food harder on the paper.
Describe the test for fat?
discribe the test for fat
What is the confirmatory test for fat?
A good confirmatory test for fat is Sudan III test. Take a test sample and add a few drops of Sudan III. A red stain shows that fat is present. Paper test is another test for fat. Melt the fat and drop it on a piece of paper. If it forms a translucent grease spot, fat is present.
What is the Brown paper bag test?
In food science this test is used to determine if a substance is fat or not. It is a crude test but it works in a pinch. Rubbing the unknown substance on the brown paper bag if fat is present the bag will get translucent. If it is water based it just gets wet.
Why is fat food fat?
Fat food is fat based off what it contains. Large amounts of fat will not change a food's size.
Does fat in food cause you to be fat?
it depends what food it is like trans fat in food is fat that you cannot loose
How do you test for fats and oils?
Rub the food on a brown paper bag. If it leaves an oily spot that does not dry, it contains fat.
Why the fried food made us fat?
Because food is usually fried in fat, and as the food fries some of the fat soaks in. Then that fat gets eaten, together with whatever fat there was in the food to begin with.
Does fat free food have fat?
no. . . hence the nameThere is no fat in fat free food but the sugar and carbs in the fat free food that you don't burn off as energy will be converted to body fat
What food is fat found in?
All food contains fat. This fat is found in the energy that the food posses and when it is not used it becomes fat. So all foods contain fat.
