Food Analysis: Fat Characterization Quiz

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

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?

<p>TLC analysis (A)</p> Signup and view all the answers

What parameter does Solid Fat Content (SFC) determine?

<p>Amount of solids in a fat (C)</p> Signup and view all the answers

Which method is NOT typically used for fat characterization?

<p>Smoke point measurement (C)</p> Signup and view all the answers

What does the Peroxide Value measure?

<p>The amount of peroxides, primary products of oxidation (A)</p> Signup and view all the answers

What is the Peroxide Value defined as?

<p>Milliequivalents (mEq) of peroxides per 1 kg of sample (A)</p> Signup and view all the answers

What does the p-Anisidine Value estimate?

<p>The amount of unsaturated aldehydes, secondary oxidation products (A)</p> Signup and view all the answers

What is the Totox Value used to indicate?

<p>Total oxidation using both peroxide and p-Anisidine values (B)</p> Signup and view all the answers

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

<p>It reacts with Na2S2O3 to form a colorless solution (B)</p> Signup and view all the answers

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

<p>Zero mEq per 1 kg of sample (C)</p> Signup and view all the answers

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

<p>Relating to mouthfeel and textural properties (B)</p> Signup and view all the answers

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

<p>SFC is faster and less subject to error compared to SFI (A)</p> Signup and view all the answers

What does Iodine Value measure?

<p>Degree of unsaturation (B)</p> Signup and view all the answers

Which chemical characteristic does the Saponification Value determine?

<p>Average fatty acid chain length (D)</p> Signup and view all the answers

What does Free Fatty Acids measurement indicate?

<p>Hydrolytic rancidity (A)</p> Signup and view all the answers

What type of rancidity results from lipolysis?

<p>Off flavors and odors (B)</p> 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?

<p>$2.19$ (B)</p> Signup and view all the answers

What is the formula for calculating Iodine Value?

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

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

<p>$\text{Dilatometry}$ (B)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Food Analysis and Preservation Quiz
32 questions
Principles of Food Analysis
4 questions

Principles of Food Analysis

UndisputableVulture avatar
UndisputableVulture
Use Quizgecko on...
Browser
Browser