Tab. 2.

Precision and accuracy data for atorvastatin and aspirin in human plasma samples.

Analyte	Concentration added (ng/mL)	Intra-day precision and accuracy (n =12; 6 from each batch)
		Concentration found (mean ± S.D; ng/mL)	Precision (%)	Accuracy (%)
Atorvastatin	0.20	0.20 ± 0.01	4.82	100
"	0.61	0.61 ± 0.01	1.50	100
"	22.3	22.2 ± 0.12	0.54	100
"	75.4	75.4 ± 0.85	1.12	99.9
"	130	130 ± 0.73	0.56	99.9
Aspirin	15.7	14.8 ± 0.91	6.15	93.8
"	45.0	45.1 ± 2.09	4.63	100
"	450	457 ± 15.1	3.29	102
"	1500	1491 ± 54.5	3.65	99.4
"	2500	2513 ± 124	4.94	101
Analyte	Concentration added (ng/mL)	Inter-day precision and accuracy (n =30; 6 from each batch)
		Concentration found (mean ± S.D; ng/mL)	Precision (%)	Accuracy (%)
Atorvastatin	0.20	0.20 ± 0.01	4.36	101
"	0.61	0.61 ± 0.01	3.76	99.9
"	22.3	22.0 ± 0.74	3.39	98.8
"	75.4	75.1 ± 1.00	1.33	99.5
"	130	130 ± 1.08	0.83	99.9
Aspirin	15.7	15.1 ± 1.03	6.82	95.6
"	45.0	44.9 ± 2.00	4.45	99.8
"	450	455 ± 12.3	2.71	101
"	1500	1488 ± 69.5	4.67	99.2
"	2500	2478 ± 122	4.92	99.1