Development and Validation of Stability Indicating HPTLC and HPLC Methods for Simultaneous Determination of Telmisartan and Atorvastatin in Their Formulations

Table 2

Intraday and interday precisions and accuracies by HPLC method.

Added conc. (µg/mL)	Precision studies		Accuracy studies
	Measured conc. (µg/mL) mean ± SD; % RSD		Theoretical conc. (µg/mL)	Measured conc. (µg/mL) ± SD; % RSD (𝑛=3)
	Intraday (𝑛=3)	Interday (𝑛=3)
TLM
12	11.77±0.94, 0.80	11.88±0.076, 0.64	21.6	21.45±0.367, 1.71
36	35.47±0.386, 1.09	35.33±0.246, 0.70	48.0	47.56±0.675, 1.42
72	70.93±1.024, 1.44	70.86±1.013, 1.43	79.2	79.26±0.731, 0.92
ATV
3	2.98±0.011, 0.37	3.01±0.031, 1.03	5.4	5.33±0.031, 0.58
9	8.86±0.026, 0.29	8.88±0.066, 0.74	12.0	11.88±0.165, 1.39
18	17.76±0.267, 1.50	17.68±0.237, 1.34	19.8	20.06±0.269, 1.34

TLM: Telmisartan; ATV: Atorvastatin.