Dual Wavelength RP-HPLC Method for Simultaneous Determination of Two Antispasmodic Drugs: An Application in Pharmaceutical and Human Serum

Table 2

Interday and intraday precision and recovery studies.

Active drugs	PG	TMP	PG	TMP	PG	TMP	Interday RSD%*
Nominal concentration (µg/mL)	80	0.08	100	0.1	120	0.12	PG	TMP
Day 1	99.74	100.29	100.65	98.56	100.28	100.72	0.456	1.146
Day 2	100.38	98.92	100.96	101.24	99.92	99.78	0.521	1.172
Day 3	98.86	100.79	99.99	100.62	98.99	99.71	0.628	0.579
Mean	99.66	100.34	100.53	100.14	99.73	100.1	0.488	0.139
Intraday RSD%	0.76	0.97	0.49	1.4	0.66	0.56

∗RSD%: relative standard deviation (should be less than 2.0).
All results are expressed in percentage values.