Table 1.

Analysis of plasma CS.

	Nominal conc. (ng/mL)	Mean conc.a (ng/mL)	CV (%)	Accuracy (%)
CS-1	25.00	24.48 ± 2.0	8.15	97.91
CS-2	50.00	49.42 ± 3.8	7.68	98.83
CS-3	200.00	198.65 ± 14.27	7.19	99.33
CS-4	400.00	426.72 ± 9.44	2.21	106.68
CS-5	800.00	793.48 ± 78.86	9.94	99.19
CS-6	1600.00	1550.05 ± 76.84	4.96	96.88
CS-7	3200.00	3250.46 ± 227.62	7.00	101.58
CS-8	6400.00	6377.16 ± 205.98	3.23	99.64

^aData represent the mean ± S.D of six observations.