Table 10.

Lot-to-lot consistency^a

	Reagent blank, A420nma		Sensitivity, mA420nm·L/mgb			Accuracy ratioc
Lotd	Measured	Tolerance	Measured	Tol. min.	Tol. max.	Control 1	Control 2	Tol. min.	Tol. max.
00001	0.056	<0.300	44.7	40.5	49.5	1.01	1.05	0.90	1.10
00004	0.055	<0.300	42.4	40.5	49.5	1.08	1.01	0.90	1.10
00014	0.065	<0.300	45.1	40.5	49.5	1.07	0.90	0.90	1.10
00026	0.065	<0.300	44.7	40.5	49.5	1.06	1.00	0.90	1.10
00029	0.068	<0.300	44.9	40.5	49.5	1.09	1.01	0.90	1.10
00031	0.073	<0300	46.2	40.5	49.5	1.04	1.00	0.90	1.10
00035	0.076	<0.300	45.6	40.5	49.5	1.05	0.99	0.90	1.10
00037	0.063	<0.300	44.9	40.5	49.5	1.07	1.01	0.90	1.10
00038	0.063	<0.300	46.4	40.5	49.5	1.04	0.98	0.90	1.10
00041	0.065	<0.300	45.2	40.5	49.5	1.07	1.03	0.90	1.10
00043	0.065	<0.300	43.7	40.5	49.5	1.09	1.05	0.90	1.10
00044	0.102	<0.300	43.2	40.5	49.5	1.09	1.04	0.90	1.10
00047	0.053	<0.300	44.9	40.5	49.5	1.02	0.99	0.90	1.10
Mean	0.067		44.8			1.06	1.00
Sr	0.012		1.110			0.027	0.038
RSDr, %	18.6		2.48			2.50	3.82

^aAbsorbance of the reagent blank at 420 nm.

^bRatio of the absorbance (in miliabsorbance) obtained with the calibrator 3 and the concentration of the same calibrator (10 mg/L).

^cRatio of the concentration (mg/L) obtained in the control of the reagent and the assigned concentration of the reference material (Control 1, 8 mg/L / Control 2, 13 mg/L).

^dResults of several lots produced.