Future Journal of Pharmaceutical Sciences

Table 2 Atorvastatin linearity data (multiwavelength regression method)

From: Simple spectrophotometric methods for the determination of amlodipine and atorvastatin in bulk and tablets

Parameter	230 nm	235 nm	240 nm	245 nm	250 nm	255 nm	260 nm
b	0.0125	0.0365	0.0365	0.0314	0.0275	0.0229	0.0171
a	0.0021	− 0.0024	0.0079	0.015	− 0.0086	0.0008	0.0109
r	0.9999	0.9998	0.9999	0.9998	0.9999	0.9998	0.9999
S_b	0.00007	0.00052	0.00038	0.00042	0.00034	0.00031	0.00021
S_a	0.0009	0.0068	0.00491	0.0056	0.0045	0.0042	0.0029
LOD (µg/mL)	0.236	0.595	0.436	0.571	0.523	0.579	0.536
LOQ (µg/mL)	0.717	1.804	1.321	1.730	1.585	1.755	1.623

b slope, a intercept, r correlation coefficient, S_b standard deviation of the slope, S_a standard deviation of the intercept, LOD limit of detection, LOQ limit of quantitation

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