Chirascan V100 (Brand Name or Equal) Circular Dichroism Instrument

The Department of Agriculture Agricultural Research Service seeks one Chirascan V100 Circular Dichroism Instrument (brand name or equal) with quotations due August 3, 2026 at 4:00 PM Central Time. This procurement is a Total Small Business Set-Aside; the small business size standard is 1,000 employees.

Place of performance and delivery destination is the USDA ARS Southern Regional Research Center in New Orleans, Louisiana. The instrument must support structural analysis of native and processed proteins with specific focus on peanut and tree-nut allergens for food-safety and allergenicity research. Required capabilities include far-UV spectral coverage down to at least 180 nm, thermal unfolding and refolding studies with Peltier-based temperature control from 0–95°C or better, automated titration and complex mixing, simultaneous measurement of circular dichroism, absorbance, and fluorescence in a single workflow, and high-sensitivity solid-state Large-Area Avalanche Photodiode detector covering 163 to 1150 nm. The system must fit a bench area of 2.2 × 0.8 meters and be compatible with small-volume cuvettes (200 microliters). Software must be Windows 11 compatible with automated secondary-structure estimation and data export in standard formats (CSV, TXT, XML). Delivery and installation must occur within 60 days after receipt of order, with full system calibration, on-site training, and a minimum five-year warranty covering parts, labor, and on-site service. Award is made to the lowest priced, technically acceptable quoter with acceptable or neutral past performance. Quoters must maintain pricing firm for 90 days from receipt date. Questions are due July 29, 2026 at 12:00 PM Central Time to melissa.santos@usda.gov. NAICS code is 334516, Analytical Laboratory Instrument Manufacturing; PSC code is 6640, Laboratory Equipment and Supplies.