Starna Scientific Ltd. (est. 1964) delivers Certified Reference Materials (CRMs) and precision quartz/glass cuvettes for spectroscopy. Accredited by UKAS to ISO/IEC 17025 and ISO 17034, we provide NIST-traceable CRMs with a lifetime guarantee and rapid recertification. Our portfolio spans UV–Vis–NIR, Mid-IR, fluorescence (including lifetime), Raman, turbidity, diffuse reflectance, Circular Dichroism (CD), plus microplate and micro-volume solutions. We also manufacture fully fused cuvettes with path lengths from 0.008 mm and volumes down to 0.5 μL, including flow and specialty designs. New for 2025: CD CRM kit, Raman references and quartz threaded flow cells. Discover how Starna ensures compliance and performance across your laboratory workflows.