Table 1

Calibration Standard Identification	Volumes Used (mL)		Total Volume (mL)	Final Concentration (µg/mL)
Calibration Standard Identification	100 or 1000 µg/mL Fe	Diluent	Total Volume (mL)	Final Concentration (µg/mL)
S0	0	1.000	1.000	0
S1	0.005 (100)	0.995	1.000	0.5
S2	0.010 (100)	0.990	1.000	1
S3	0.020 (100)	0.980	1.000	2
S4	0.005 (1000)	0.995	1.000	5
S5	0.010 (1000)	0.990	1.000	10
S6	0.015 (1000)	0.985	1.000	15
S7	0.018 (1000)	0.982	1.000	18
S8	0.020 (1000)	0.980	1.000	20

Table 1: Calibration Standard Preparation.