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. 2013 Sep 17;6(5):1283–1289. doi: 10.3892/etm.2013.1302

Table II.

Precision data on the proposed HPLC method in human serum.

Nominal concentration (ng/ml) Precision
Intra-day (n = 8)
Inter-day (n = 5)
Mean ± SEM (ng/ml) RSD (%) Mean ± SEM (ng/ml) RSD (%)
8.44 8.14±0.42 5.16 7.99±0.69 8.64
135.04 131.47±5.87 4.46 130.36±10.29 7.89
2160.64 2098.8±130.55 6.22 2018.2±161.66 8.01

RSD, relative standard deviation, HPLC, high-performance liquid chromatography.