Identification of hyaluronic acid in seized samples by Hypercarb chromatography-high resolution mass spectrometry.

Overview

• This research develops a method to identify hyaluronic acid (HA) in seized samples, which is important for verifying substances found during inspections of stables and kennels.
• The method uses chemical hydrolysis followed by Hypercarb chromatography combined with high-resolution mass spectrometry (MS/MS) for accurate detection of HA.

Introduction to Hyaluronic Acid

• Hyaluronic acid (HA) is a natural polysaccharide composed of repeating units of N-acetyl-d-glucosamine and d-glucuronic acid.
• It has a high molecular weight, sometimes reaching up to 20 million Daltons (MDa).
• Used medically since the 1970s, HA is applied to treat osteoarthritis and joint injuries, especially in horses and dogs.
• High molecular weight HA forms a viscous hydrogel when dissolved in water, which distinguishes its solutions from typical pharmaceutical formulations.

Challenges in Identification

• During inspections of stables and kennels, clear viscous solutions are often encountered.
• Without a reliable analytical method, it is difficult or impossible to confirm whether these are HA-containing solutions or other unknown compounds.

Analytical Method Developed

• The paper proposes a simple, effective approach involving chemical hydrolysis to break down the HA polymer into identifiable components.
• After hydrolysis, samples are analyzed using Hypercarb chromatography, which is a form of liquid chromatography utilizing porous graphitic carbon to separate molecules based on their chemical properties.
• High-resolution tandem mass spectrometry (MS/MS) is then used to detect and identify molecular fragments specific to HA.
• This combination ensures high selectivity and sensitivity, making it possible to accurately identify HA in complex mixtures or seized materials.

Significance and Applications

• Provides a forensic and quality control tool to confirm the presence of HA in substances encountered during animal healthcare product inspections.
• Helps regulatory bodies and law enforcement differentiate HA-based treatments from other substances, potentially fraudulent or harmful.
• Supports the integrity of veterinary pharmaceutical monitoring by enabling confident identification of HA.
• The technique’s simplicity and reliability could facilitate wider adoption in laboratories handling veterinary samples and seized substances.

Summary

• The study addresses a practical challenge in veterinary and forensic science by establishing a method to detect hyaluronic acid in viscous samples.
• The use of chemical hydrolysis combined with Hypercarb chromatography and high-resolution MS/MS creates a robust analytical protocol.
• This method enhances the ability to identify HA-containing products, ensuring proper regulatory oversight and animal treatment verification.