Microwave-assisted forced degradation using high-throughput microtiter platforms.

Area of Science:

• Analytical Chemistry
• Pharmaceutical Sciences
• Chemical Engineering

Background:

• Forced degradation studies are crucial for understanding drug stability and identifying degradation pathways.
• Traditional methods are often time-consuming and labor-intensive, limiting throughput.
• High-throughput screening is essential for efficient drug development.

Purpose of the Study:

• To develop and validate a novel high-throughput platform for parallel microwave-assisted forced degradation studies.
• To reduce the time and effort required for forced degradation analysis.
• To evaluate the platform's effectiveness using indomethacin as a model drug.

Main Methods:

• A high-throughput platform utilizing silicon carbide (SiC) plates with multiple boreholes for sealed HPLC/GC vials.
• Simultaneous microwave heating of up to four SiC platforms (80 reactions) with online temperature control.
• Forced degradation studies under various acidic, basic, oxidative, solvent, and gaseous stress conditions at elevated temperatures (up to 200 °C) and pressures (up to 20 bar).

Main Results:

• The platform successfully performed parallel forced degradation studies at high temperatures and pressures.
• Indomethacin degradation under acidic, basic, and oxidative stress at 150 °C for 5 min yielded comparable results to lower temperatures requiring 0.5-20 hours.
• Solvent stability and gas exposure tests were efficiently conducted at elevated temperatures.

Conclusions:

• The developed microwave-assisted platform significantly accelerates forced degradation studies, reducing analysis time.
• The integrated reaction and analysis in sealed vials minimizes sample handling and potential errors.
• This high-throughput approach offers a rapid and efficient method for assessing drug stability under diverse stress conditions.