Future Journal of Pharmaceutical Sciences

Table 1 Amlodipine 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	0.0379	0.0447	0.0291	0.0131	0.0057	0.0023	0.0006
a	0.0067	0.0047	0.0018	0.0028	0.0021	0.0011	0.005
r	0.9994	0.9995	0.9994	0.9997	0.9998	0.9991	1.000
S_b	0.0009	0.0009	0.0007	0.0002	0.00009	0.00007	0.00003
S_a	0.0074	0.0076	0.0056	0.001	0.0007	0.0005	0.00006
LOD (µg/mL)	0.396	0.344	0.388	0.287	0.240	0.454	0.626
LOQ (µg/mL)	1.199	1.042	1.176	0.869	0.727	1.376	1.897

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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