Table 14. Precision of DF determination across days, operators, reagent lots, and equipment lines for three reconstructed samples (low, medium, and high DF level).

Reconstructed Sample	Measured DF (Mean)	Standard Deviation	%CV
Low DF (0.2%)	0.18%	0.04%	22.92%
Medium DF (1.0%)	1.19%	0.15%	12.31%
High DF (10%)	10.5%	0.779%	7.39%