Sensitive method for endotoxin determination in nanomedicinal product samples.

Area of Science:

• Analytical Chemistry
• Nanotechnology
• Pharmaceutical Science

Background:

• Nanomaterials and nanomedicines can interfere with standard endotoxin detection assays.
• Accurate endotoxin quantification is critical for drug safety and regulatory compliance.
• Existing methods like Limulus Amebocyte Lysate assay are susceptible to interference from nanoproducts.

Purpose of the Study:

• To develop and validate a nanomaterial-compatible method for endotoxin quantification.
• To address the limitations of conventional endotoxin assays in the presence of nanomedicinal products.

Main Methods:

• Indirect measurement of endotoxin by quantifying 3-hydroxylated fatty acids of lipid-A.
• Utilizing Ultra High Performance Liquid Chromatography coupled with mass spectrometry (UHPLC-MS).
• Comparison of UHPLC-MS results with the Limulus Amebocyte Lysate (LAL) method.

Main Results:

• The UHPLC-MS method demonstrated sensitivity and accuracy in endotoxin determination.
• The developed method showed no specific interference from nanomaterials.
• UHPLC-MS results correlated with the LAL method, validating its performance.

Conclusions:

• The UHPLC-MS method is a reliable, sensitive, and accurate tool for quantifying endotoxin in nanomedicinal products.
• This method overcomes the interference issues associated with traditional assays.
• It provides a straightforward approach for regulatory-compliant endotoxin testing of nanomedicines.