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Drugs

qlabs-determining-antimicrobial-effectiveness

Determining Antimicrobial Effectiveness

An antimicrobial or preservative is defined as a chemical agent that will kill or inhibit the growth of microorganisms. Common antimicrobials utilized in drug, OTC, cosmetic, and personal care products include parabens, alcohols, and quaternary ammonium compounds.  Antimicrobial Effectiveness Testing (AET) also known as Preservative Efficacy Testing (PET) is microbial challenge methodology performed to assure

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qlabs-periodic-table-graphic

New USP Elemental Impurities Chapters Near Implementation

On January 1, 2018, USP/NF Chapter 231 on Heavy Metals will be shuttled and new chapters 232, 233 and 2232 on Elemental Impurities will be implemented. What does this mean? It means that the century-old qualitative colorimetric test for the presence of Heavy Metals has been replaced by considerably more sophisticated methods (ICP-OES and ICP-MS)

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