Question

Lycopodium spores are used in quantitative microscopy for the following:

• A. Determine % purity of drugs
• B. Estimation of percentage of foreign organic matter
• C. Determination of palisade ratio
• D. Measurement of area of single layered tissue

Answer 1

The Correct Option is C

To determine the correct usage of Lycopodium spores in quantitative microscopy within the context of Pharmacognosy, let's analyze each of the given options:

1. Determine % purity of drugs: Lycopodium spores are not typically used for determining the percentage purity of drugs. This process usually involves chemical analysis techniques like chromatography, spectrophotometry, or titration.
2. Estimation of percentage of foreign organic matter: While microscopy can aid in the visualization of foreign organic matter, Lycopodium spores are not specifically utilized for estimating its percentage. This is generally done using different assessment methods in quality control.
3. Determination of palisade ratio: In Pharmacognosy, Lycopodium spores are used as a calibrative measure in microscopic analysis for determining the palisade ratio, which is the ratio of the number of palisade cells to the number of epidermal cells. This technique is used for the identification and standardization of leaf drugs.
4. Measurement of area of single layered tissue: While microscopy can measure the area of tissues, Lycopodium spores do not directly aid in this measurement. Techniques like micrometry or image analysis software are more commonly utilized for such purposes.

Based on the above analysis, the correct answer is:

• Determination of palisade ratio

Therefore, Lycopodium spores are specifically used in quantitative microscopy to determine the palisade ratio. This is a crucial step in the evaluation and authentication of botanical drug materials.