Novel ecofriendly spectrophotometric methods for the determination of six dihydropyridines calcium channel blockers through derivatization with sulfophtalein dye: application to tablet analysis

Table 5 Linearity results for the evaluated spectrophotometric procedures

Parameter	AML	LAC	LAML	NIF	NIM	NIT
Parameter	Value
Linearity, µg/mL	3.40 – 17.00	1.14 – 9.11	1.135 – 9.08	4.16 – 12.40	0.84 – 5.86	6.52 – 19.60
Correlation coefficient (R²)	0.9996	0.9992	0.9992	0.9996	0.9993	0.9980
Intercept ± SD^*	0.0913 ± 2.29 × 10^–3	− 0.0077 ± 7.37 × 10^–3	− 0.0358 ± 5.11 × 10^–3	0.0056 ± 2.60 × 10^–3	0.0274 ± 2.66 × 10^–3	0.0711 ± 7.92 × 10^–3
Slope ± SD	0.0173 ± 2.03 × 10^–4	0.0791 ± 1.32 × 10^–3	0.0754 ± 8.91 × 10^–4	0.0255 ± 2.95 × 10^–4	0.0255 ± 7.12 × 10^–4	0.0215 ± 5.72 × 10^–4

ISSN: 2661-801X