Table 1.

Recovery and imprecision of the assay.

	Accuracy		Imprecision, % CV
Amount of Hgb, mg (relative amount)	Measured enzyme activitya	Recovery, %	Intraassay	Interassay
0.56 (100%b)	21.8	100b	2.1	4.5
0.14 (25%)	5.3	97.2	2.5	6.7
0.28 (5%)	1.03	94.8%	4.6	8.2
0.00112 (0.2%)	0.04	92.1%	9.7	13.2

^aUnit is µmol · (g Hgb)⁻¹ · h⁻¹

^b100% was arbitrarily assigned.