A validated HPLC method for the determination of octocrylene in solid lipid nanoparticle systems.

Area of Science:

• Pharmaceutical Sciences
• Analytical Chemistry
• Materials Science

Background:

• UV filters are essential in sunscreens, categorized by their absorption or blocking mechanisms.
• Octocrylene is a key chemical UVB absorber, while Solid Lipid Nanoparticles (SLNs) offer physical-like UV protection.
• Integrating octocrylene into SLNs combines chemical and physical UV protection strategies.

Purpose of the Study:

• To develop and validate a new High-Performance Liquid Chromatography (HPLC) method for determining octocrylene concentration in SLN formulations.
• To assess the stability of octocrylene within SLN systems under various storage conditions.
• To ensure the accurate quantification of octocrylene for quality control of novel UV-protective SLN formulations.

Main Methods:

• Octocrylene quantification in SLN formulations using a validated HPLC method.
• Method validation followed ICH guidelines (Q2(R1)) using a C18 ACE column and UV detection at 210 nm.
• Stability studies involved storing SLN formulations at different temperatures (4°C, 25°C, 40°C) for 360 days and comparing octocrylene recovery.

Main Results:

• A new, validated HPLC method was established for octocrylene determination with a working range of 2.5 x 10^-5 to 5.5 x 10^-5 M.
• The method achieved good correlation and accuracy, with a Limit of Detection (LOD) of 1.64 x 10^-6 M and Limit of Quantitation (LOQ) of 4.97 x 10^-6 M.
• Octocrylene recovery percentages were investigated across different storage conditions and durations, providing insights into formulation stability.

Conclusions:

• The developed HPLC method is suitable for accurate octocrylene quantification in SLN formulations.
• The study provides crucial data on the stability of octocrylene within SLNs, essential for product development.
• This research contributes to the advancement of stable and effective UV-protective nanocarrier systems.