LIPID TEST LAB

• Learning Goal:Identify foods containing lipidsIdentify a test for the presence of and relative amount of lipids foods contain

• Safety:General Awareness SafetyClean Workspace

LIPID TEST• Background (don’t write):Many substances contain lipids (fats) and many claim to have little or no lipids (fat free…). Today we’ll do a test to show whether or not our chips really do or do not have lipids

Husband changing oil for car

Waxes

LIPID TEST

• How can you tell if something you’ve eaten is oily?

• Control Test:Explain how you could set up a control test to then reference for your food items

Control: draw this in your lab book. When finished, draw this on the brown paper towel.

-

H2O

+

OIL

1. Send person #1 to come up and put 1 drop of H2O on the – side and

one drop of oil on the + side

2. Grab a paper towel to place under the brown paper so it doesn’t

leak

LIPID TEST LAB1. While waiting for controls to dry, make

observations from the nutritional labels1. OBSERVATIONS:

FRIED BAKED / POPPEDLIPIDS:• Total Fat = _____• Sat Fat = ____• Trans Fat = ___• Other fats listed = _____

Different ingredients:• -• -• -

LIPIDS:• Total Fat = _____• Sat Fat = ____• Trans Fat = ___• Other fats listed = _____

Different ingredients:• -• -• -

LIPID TEST

Variables:IV: (this is what is influencing what you are testing)DV: ( this is how you’re measuring)

LIPIDS TEST

• Hypothesis:Make a hypothesis regarding what you’ve read on the nutritional label and what you observe on control paper

“If there is an increase of __________ then ______ will inc/dec because _____________”

Data TableSubstance +/- observations

Water (control) -Oil (control) +

Chip 1 _________

Chip 2 _________

Chip 3 _________

Other __________

1. Use the control sheet as a guide to determine if the chips test +/-

2. Tear paper in half3. Label one sheet of the paper fried and the other baked4. Obtain approximately equal sized chips from each type

of chip5. Place chip on respective square sheet6. Crumble the paper with the chip on the inside so no

crumbs leak out7. Open paper & dispose of chip fragments8. Compare to control sheet & fill out data table

PROCEDURES (don’t write)

Conclusion: (yes you may eat your lipids/lipidless examples QUIETLY while you work & only the ones at your table)

• Was your hypothesis right or wrong?

• What are some generalizations you could make about foods that tested + for lipids?

• What about foods that tested – for lipids?

• What are some other food items you’d been interested in testing?

LIPID TEST WARM UP

• So what could I do to test if something has lipids present?