20,345
edits
Changes
Created page with "==Key Stage 3== ===Meaning=== Lipids can be tested for with different methods. =====The Paper Test Method===== : 1. Take a small sample of food. : 2. Wipe it on a piece o..."
==Key Stage 3==
===Meaning===
[[Lipid]]s can be tested for with different methods.
=====The Paper Test Method=====
: 1. Take a small sample of food.
: 2. Wipe it on a piece of paper.
: 3. Hold the paper up to the light.
: 4. If the paper has turned translucent the food contained [[lipid]]s.
{| class="wikitable"
|-
|[[File:FatTest.png|center|600px]]
|-
| style="height:20px; width:600px; text-align:center;" |There are two patches where fat has been asborbed by the paper.
|}
=====The Alcohol Emulsion Test Method=====
: 1. Take a small sample of food.
: 2. Place the food in [[ethanol]] and mix by shaking or stirring.
: 3. [[Filter]] the [[mixture]].
: 4. Add the clear [[solution]] to some water.
: 5. If lipids are present then a white [[emulsion]] will appear.
{| class="wikitable"
|-
|[[File:AlcoholEmulsionTest.png|center|600px]]
|-
| style="height:20px; width:600px; text-align:center;" |The mixture on the right shows the presence of [[lipid]]s.
|}
===Meaning===
[[Lipid]]s can be tested for with different methods.
=====The Paper Test Method=====
: 1. Take a small sample of food.
: 2. Wipe it on a piece of paper.
: 3. Hold the paper up to the light.
: 4. If the paper has turned translucent the food contained [[lipid]]s.
{| class="wikitable"
|-
|[[File:FatTest.png|center|600px]]
|-
| style="height:20px; width:600px; text-align:center;" |There are two patches where fat has been asborbed by the paper.
|}
=====The Alcohol Emulsion Test Method=====
: 1. Take a small sample of food.
: 2. Place the food in [[ethanol]] and mix by shaking or stirring.
: 3. [[Filter]] the [[mixture]].
: 4. Add the clear [[solution]] to some water.
: 5. If lipids are present then a white [[emulsion]] will appear.
{| class="wikitable"
|-
|[[File:AlcoholEmulsionTest.png|center|600px]]
|-
| style="height:20px; width:600px; text-align:center;" |The mixture on the right shows the presence of [[lipid]]s.
|}