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

Table 3

Recovery and precision for metildigoxin in spiked whole blood samples.

Concentration (ng/mL)	Mean (ng/mL)	Extraction recovery (%)	CV (%)
			Intraday	Interday
1	1.21±0.08	62±5	4.56–9.90	7.45
3	3.23±0.26	67±3	4.82–9.62	7.51
8	7.96±0.78	94±8	2.32–9.80	6.65