Food Analysis: Fat Characterization Quiz

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What method is typically required for fat extraction if not bulk fat/oil?

Solvent extraction (correct)

Gas chromatography analysis

Iodine value determination

TLC analysis

Which method is NOT used for physical characterization of bulk fat or oil?

Melting point determination

Refractive index measurement

Smoke point measurement

Gas chromatography analysis (correct)

What is the purpose of avoiding heat and light in fat extraction processes?

To decrease the amount of antioxidants needed

To improve the color consistency of the extracted fat

To increase the oxidative stability (correct)

To speed up the extraction process

Which method is used to evaluate the oxidative stability of lipid fractions?

TLC analysis Signup and view all the answers

What parameter does Solid Fat Content (SFC) determine?

Amount of solids in a fat Signup and view all the answers

Which method is NOT typically used for fat characterization?

Smoke point measurement Signup and view all the answers

What does the Peroxide Value measure?

The amount of peroxides, primary products of oxidation Signup and view all the answers

What is the Peroxide Value defined as?

Milliequivalents (mEq) of peroxides per 1 kg of sample Signup and view all the answers

What does the p-Anisidine Value estimate?

The amount of unsaturated aldehydes, secondary oxidation products Signup and view all the answers

What is the Totox Value used to indicate?

Total oxidation using both peroxide and p-Anisidine values Signup and view all the answers

In the reaction for determining the Peroxide Value, what happens to ROOH?

It reacts with Na2S2O3 to form a colorless solution Signup and view all the answers

For a freshly refined oil, what would be its expected Peroxide Value?

Zero mEq per 1 kg of sample Signup and view all the answers

What is the main application of Solid Fat Content (SFC)?

Relating to mouthfeel and textural properties Signup and view all the answers

Why is Solid Fat Content (SFC) preferred over Solid Fat Index (SFI)?

SFC is faster and less subject to error compared to SFI Signup and view all the answers

What does Iodine Value measure?

Degree of unsaturation Signup and view all the answers

Which chemical characteristic does the Saponification Value determine?

Average fatty acid chain length Signup and view all the answers

What does Free Fatty Acids measurement indicate?

Hydrolytic rancidity Signup and view all the answers

What type of rancidity results from lipolysis?

Off flavors and odors Signup and view all the answers

In the method to estimate Free Fatty Acids, what factor is used to convert FFA percentage to FFA as palmitic acid?

$2.19$ Signup and view all the answers

What is the formula for calculating Iodine Value?

$(B - S) \times N \times 126.9 \times 1000 / W$ Signup and view all the answers

Which method involves the plotting of volume vs. temperature to measure Solid Fat Content?

$\text{Dilatometry}$ Signup and view all the answers