Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
4 Cards in this Set
- Front
- Back
|
Iodine test |
Drip iodine solution onto the sample. If the solution turns grey to blue black, starch is present |
|
|
Benedict's test |
Add equal amount of Benedict's solution and unknown sample. Heat @90°C for 2-3 mins. Light green, yellow, orange or brick red precipitate means presence of reducing sugar, from low concentration to high |
|
|
Biuret test |
Add equal amount of food sample and sodium hydroxide into a test tube. Mix well. Add a drop of copper sulfate and mix. Repeat adding a drop and mixing, until no further change. If the end result is violet color, proteins present. If it is blue, no protein |
|
|
Ethanol emulsion test |
Add small amount of food sample and 2 ml of ethanol. Mix well. Allow mixture to settle. If cloudy white emulsion, fats or lipids present |
