Question

Which technique is used to determine the particle size of a pharmaceutical suspension?

• A. \( \text{Dynamic Light Scattering (DLS)} \)
• B. \( \text{X-ray Diffraction (XRD)} \)
• C. \( \text{Gas Chromatography (GC)} \)
• D. \( \text{UV-Visible Spectroscopy} \)

Hint:

DLS provides rapid and accurate particle size measurement, crucial for drug stability and formulation efficiency.

Answer 1

The Correct Option is A

Dynamic Light Scattering (DLS) is widely used for particle size determination in pharmaceutical suspensions. It measures Brownian motion and correlates it with particle size distribution using laser light scattering techniques. Other methods such as XRD, GC, and UV spectroscopy are not suitable for particle size analysis.