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Analytical Procedure for Natural Products Quiz

12 Questions

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Analytical Procedure for Natural Products Quiz

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Questions and Answers

What is the principal limiting step in the chemical analysis of natural products?

Analysis using gas chromatography

Extraction of metabolites from the matrix (correct)

Evaporation of the solvent

Purification using nuclear magnetic resonance

Which technique intensifies solvent extraction by innovative methods like microwave or ultrasound?

Pressure liquid solvent extraction (correct)

Supercritical solvent extraction

Kumagawa extraction

Soxhlet extraction

What step in the analytical procedure is complete after only seconds or minutes?

Analysis using gas chromatography (correct)

Distillation for concentration

Evaporation of the solvent

Extraction of metabolites

Which type of extraction represents 80% of the total processing time in the analytical procedure for natural products?

Solvent-extraction procedure Signup and view all the answers

What is the most commonly used method for concentration or purification after extraction in the analytical procedure for natural products?

Distillation Signup and view all the answers

Which technique is used to transfer the desired compounds by liquid-liquid extraction in the analytical procedure for natural products?

Gravimetry Signup and view all the answers

What is the main goal of Green Analytical Chemistry?

To develop new techniques that reduce the influence of chemicals on the environment Signup and view all the answers

What is a key challenge faced by researchers according to the text?

Developing techniques to meet the need for information while reducing environmental impact Signup and view all the answers

Which ancient civilizations are mentioned as having used innovative extraction processes?

Mayas and Aztecs Signup and view all the answers

What extraction technique is highlighted in the text as a solvent-free method for millennia?

Crushing olives for olive oil extraction Signup and view all the answers

Why does virgin olive oil not require further treatment before consumption?

Because it preserves volatile and non-volatile compounds through mechanical extraction Signup and view all the answers

What is the principle behind extracting essential oils using cold pressing?

Squeezing at room temperature to release essential oils Signup and view all the answers