PDE-5 inhibitors in complex matrices: Recent updates on pretreatment and detection methods.

Area of Science:

• Analytical Chemistry
• Pharmacology
• Public Health

Background:

• Phosphodiesterase-5 (PDE-5) inhibitors, used for erectile dysfunction, are often illegally adulterated.
• Illicit analogues pose risks due to unknown structures and toxicity.
• Ensuring the safety and quality of these medications is a significant public health concern.

Purpose of the Study:

• To review and critically evaluate sample pretreatment methods and detection techniques for PDE-5 inhibitors.
• To identify emerging trends and novel materials in analytical methodologies.
• To guide the selection of efficient analytical strategies for PDE-5 inhibitor analysis.

Main Methods:

• Summarizes common pretreatment techniques: dissolution, dilution, protein precipitation, liquid-liquid extraction.
• Highlights advanced methods: magnetic solid-phase extraction, dispersive liquid-liquid microextraction, solid-phase microextraction.
• Discusses detection techniques: LC-MS/MS, GC-MS, HPTLC, with a focus on high-resolution mass spectrometry.

Main Results:

• Novel materials like COFs, CNTs, and MIPs are advancing pretreatment methodologies.
• High-resolution mass spectrometry is a key area of current research for sensitive detection.
• Various analytical strategies exist, each with specific advantages and limitations for different sample matrices.

Conclusions:

• Efficient analytical strategies are essential for detecting adulterants in PDE-5 inhibitors.
• Advancements in sample preparation and detection techniques are crucial for public health.
• Further research into novel materials and high-resolution mass spectrometry will enhance analytical capabilities.