TABLE 1.

Characteristics of the freeze‐dried candidate standard SS258

Plasma volume	290 ml with 40 mM Hepes buffer
D‐dimer content	Estimated >6 µg/ml
Ampoules filled @ weight (CV)	556 @ 0.51 g (0.72%)
Dry weight (CV)	0.038 g (1.61%)
Residual moisture (CV)	0.19 mg (13.5%)