Table 1.

Preparation of Calibration Standards.

Standard	Nominal Concentration (mg/mL)	Preparation Procedure
		Standard (μL)	CMH reagent (μL)
S1	0	0	200
S2	80	80	120
S3	120	120	80
S4	160	160	40
S5	180	180	20
S6	200	200	0