A Certified Spiking Solution® of (±)-Epinephrine HCl and (±)-Norepinephrine HCl. This multi-component mix is suitable for use in preparation of linearity standards, calibrators, or controls in addition to other critical quantitative applications such as internal proficiency testing or OEM use in preparation of reagents, assay development, and instrument IQ/OQ. Certified concentration values for each component provides increased efficiency from less time remaking pools due to dilution errors or rerunning samples.