An approach to select linear regression model in bioanalytical method validation

Journal of Analytical Science and Technology

Table 6 Stability studies for chlorthalidone (n = 5)

Level	Stability at room temperature						Stability at − 20 °C						Freeze thaw (FT) stability
	% Nominal			% RSD			% Nominal			% RSD			% Nominal			% RSD
	2 h	4 h	6 h	2 h	4 h	6 h	10 days	20 days	30 days	10 days	20 days	30 days	FT1	FT2	FT3	FT1	FT2	FT3
LQC	98.84	98.105	98.38	2.31	1.74	1.546	96.74	96.968	98.91	1.03	3.51	1.65	90.910	95.06	98.81	1.18	1.54	1.98
HQC	100.8	100.6	100.6	2.48	0.48	1.678	100.50	100.31	100.7	0.36	2.81	0.23	100.49	100.4	100.45	0.17	0.87	0.28