Table 6. Stability of clopidogrel, 2-Oxo-CLP, and CAMD in human plasma.

Analytes	Added (ng/mL)	Found (ng/mL)
		At –80 °C for 45 days	After three-thaw cycles	Plasma at room temperature for 8 hours	Extract at room temperature for 8 hours	Extract in the auto-sampler at 4 °C for 24 hours
All the data are presented as mean±SD. 2-Oxo-CLP: 2-oxo-clopidogrel; CAMD: clopidogrel active metabolite derivative.
Clopidogrel	0.2	0.2±0.0	0.2±0.0	0.2±0.0	0.2±0.0	0.2±0.0
	10	10.1±0.2	10.1±0.8	10.4±0.8	10.0±1.4	10.0±0.8
2-Oxo-CLP	2	2.0±0.1	1.9±0.2	2.2±0.4	2.1±0.2	2.2±0.2
	50	50.6±1.2	51.0 ± 3.9	52.2±5.1	50.1±7.6	49.0±3.7
CAMD	2	2.0±0.1	1.9 ± 0.2	2.2±0.4	2.0±0.2	2.1±0.2
	50	50.4±1.2	51.5±3.8	51.1±4.9	49.6±7.7	50.1±3.9