The invention discloses a liquid-state calibration product for determining the ProGRP content. The liquid-state calibration product for determining the ProGRP content is prepared from the following components: 10 to 200mmol / L of
buffer solution, 0.1 to 0.5 percent (w / v) of
preservative, 1 to 5 percent (w / v) of
protein stabilizer, 5 to 10 percent (w / v) of
sugar stabilizer, 1 to 5 percent (w / v) of EDTA (
Ethylene Diamine Tetraacetic Acid), 0.1 to 0.5 percent (w / v) of surfactant, 0 to 5000pg / mL of ProGRP
antigen, and 1 to 10mg / L of
aprotinin. The liquid-state calibration product for determining the ProGRP content provided by the invention has the advantages that no
freeze drying is needed, no redissolving is needed when in use, uncontrollable factors probably occurred in a redissolving processare reduced, and a clinical detection result is more accurate. The
sugar stabilizer, a
metalloproteinase inhibitor (EDTA), the
aprotinin and other components are added, so that the stability of the ProGRP
protein is effectively improved, and the prepared ProGRP liquid-state calibration product is better in stability and can be stably stored for 12 months by being refrigerated at 2 to 8 DEG C.