The National Institute of Standards and Technology (NIST) intends to negotiate a sole-source contract with AB Sciex for a Capillary Electrophoresis (CE) Analysis Instrument, as outlined in solicitation number NB645030-25-01696. This procurement is driven by the need for specific analytical characterization required by NIST's Biomolecular Structure and Function group, which is essential for the ongoing evaluation of the NIST monoclonal antibody reference material (NISTmAb) used in the biomanufacturing industry. The unique capabilities of the PA800 Plus system from AB Sciex align with NIST's quality monitoring processes for biotherapeutic materials, making it the only identified provider capable of delivering the necessary hardware and software systems. Interested parties may submit responses by July 26, 2025, and should contact Tish Walker at latish.walker@nist.gov for further information.