Solvent Selection in Pharmacognosy
6 Questions
0 Views

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 is the primary consideration for selecting a suitable solvent in extraction?

  • Cost and availability of the solvent
  • Ability to extract the desired compounds while leaving behind the unwanted ones (correct)
  • Environmental impact of the solvent
  • Polarity of the solvent

Which of the following solvents is most suitable for extracting alkaloids?

  • Methanol (correct)
  • Acetonitrile
  • Hexane
  • Ether

What is the primary factor that affects the selectivity of a solvent?

  • Polarity of the solvent (correct)
  • Toxicity of the solvent
  • Solubility of the phytoconstituents
  • Viscosity of the solvent

Which type of solvent is most suitable for extracting terpenes?

<p>Hexane (C)</p> Signup and view all the answers

Why is it important to consider the environmental impact of a solvent?

<p>To reduce the risk of environmental pollution (A)</p> Signup and view all the answers

Which of the following is a characteristic of a good solvent?

<p>Ability to selectively extract the desired compounds (C)</p> Signup and view all the answers

Study Notes

Solvent Selection in Extraction in Pharmacognosy

Importance of Solvent Selection

  • Selection of a suitable solvent is crucial in extraction as it affects the quality and quantity of the extracted phytoconstituents
  • A good solvent should be able to extract the desired compounds while leaving behind the unwanted ones

Factors Affecting Solvent Selection

  • Polarity: Solvents with similar polarity to the phytoconstituents are more effective in extraction
  • Solubility: Solvent should be able to dissolve the phytoconstituents of interest
  • Selectivity: Solvent should selectively extract the desired compounds while minimizing the extraction of impurities
  • Toxicity: Solvent should be non-toxic and safe for use
  • Cost and Availability: Solvent should be cost-effective and easily available
  • Environmental Impact: Solvent should have a minimal environmental impact

Types of Solvents Used in Extraction

  • Polar solvents:
    • Water
    • Methanol
    • Ethanol
    • Acetone
  • Non-polar solvents:
    • Hexane
    • Chloroform
    • Ether
  • Intermediate polarity solvents:
    • Ethyl acetate
    • Isopropyl alcohol
    • Acetonitrile

Solvent Selection Criteria for Different Phytoconstituents

  • Alkaloids: Polar solvents like water, methanol, and ethanol are effective
  • Glycosides: Polar solvents like water and methanol are effective
  • Terpenes: Non-polar solvents like hexane and chloroform are effective
  • Flavonoids: Polar solvents like methanol and ethanol are effective

Solvent Selection in Extraction in Pharmacognosy

Importance of Solvent Selection

  • Suitable solvent selection is crucial in extraction as it directly affects the quality and quantity of extracted phytoconstituents
  • A good solvent should selectively extract desired compounds while leaving behind unwanted ones

Factors Affecting Solvent Selection

Polarity and Solubility

  • Solvents with similar polarity to phytoconstituents are more effective in extraction
  • Solvent should be able to dissolve phytoconstituents of interest

Selectivity and Toxicity

  • Solvent should selectively extract desired compounds while minimizing impurities
  • Solvent should be non-toxic and safe for use

Practical Considerations

  • Solvent should be cost-effective and easily available
  • Solvent should have a minimal environmental impact

Types of Solvents Used in Extraction

Polar Solvents

  • Water
  • Methanol
  • Ethanol
  • Acetone

Non-Polar Solvents

  • Hexane
  • Chloroform
  • Ether

Intermediate Polarity Solvents

  • Ethyl acetate
  • Isopropyl alcohol
  • Acetonitrile

Solvent Selection Criteria for Different Phytoconstituents

Alkaloids and Glycosides

  • Polar solvents like water, methanol, and ethanol are effective for alkaloid extraction
  • Polar solvents like water and methanol are effective for glycoside extraction

Terpenes

  • Non-polar solvents like hexane and chloroform are effective for terpene extraction

Flavonoids

  • Polar solvents like methanol and ethanol are effective for flavonoid extraction

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Description

This quiz covers the importance of selecting a suitable solvent in extraction, factors affecting solvent selection, and more. Learn about the role of polarity and solubility in solvent selection.

More Like This

Use Quizgecko on...
Browser
Browser