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Pharma Newsletters >> Eurofins BioPharma Services Newsletter 19 - February 2018 >> Charged Aerosol Detection

Charged Aerosol Detection

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A powerful enabling tool for a CDMO in Biopharmaceutical Formulation and Development

by Joe Page, PhD, VP Operations and Quality Control, Eurofins Advantar,

The biopharmaceutical industry has experienced an exponential growth in the number of site-directed drugs. These specifically targeted drugs are effective at lower doses and minimise or eliminate side effects. Site directed delivery of DNA or RNA therapeutics often relies on nanoparticles to deliver their payload. Delivery to the cell nucleus typically involves the use of a solid lipid nanoparticle (SLN). The components of these lipid nanoparticles are critical to their effectiveness.

The analysis of nanoparticles is challenging as many of the components cannot be detected by traditional HPLC-UV. Eurofins Advantar scientists develop HPLC methods that employ a sensitive charged aerosol detector (CAD) to quantify these non-chromophoric components. For example, scientists use UHPLC-CAD method to measure multiple lipids and their degradation products (lyso-PC and free fatty acids) to support the analysis of a client’s lipid nanoparticle drug product.

The useful application of HPLC-CAD goes well beyond the analysis of nanoparticles. Many antibiotics (gentamicin, streptomycin, tobramycin), including the broad spectrum anti-MRSA antibiotics in development cannot be measured by UV, but are perfect candidates for HPLC-CAD analysis. For example, Eurofins Advantar manufactures and tests a topical antibiotic cream, paromomycin, for the US Army. This antibiotic cannot be measured by UV. Scientists have optimised and validated HPLC-CAD assays for the analysis of potency and purity in this drug product.

Carbohydrates in many drug products such as mannitol, sucrose and carboxymethyl cellulose can now be measured by HPLC-CAD. Polymers such as polyethylene glycol and dextrans are easily measured by HPLC-CAD. Even counter ions in drug products, such as sodium and potassium, can be measured by HPLC-CAD.

With experts in method development, formulation and 10 charged aerosol detectors at our site, Eurofins Advantar has been helping Biopharma clients advance their nucleic, antibiotic, and carbohydrate drug products to market. Offering non-sterile manufacturing services with a highly experienced staff in a 1,200 ft2 manufacturing suite that includes an ISO 8 clean room, this FDA-inspected facility is ideal for GMP manufacturing of a wide range of non-sterile topical products, including clinical products. For more information visit: