Analysis of Digoxin and Metildigoxin in Whole Blood Using Solid-Phase Extraction and Liquid Chromatography Tandem Mass Spectrometry

Table 2

Recovery and precision for digoxin in spiked whole blood samples.

Concentration (ng/mL)	Mean (ng/mL)	Extraction recovery (%)	CV (%)
			Intraday	Interday
1	1.11±0.13	88±7	4.56–10.00	7.80
3	3.27±0.23	83±2	1.95–7.35	4.83
8	7.42±0.70	100±3	0.78–9.91	5.82