Smart stability indicating spectrophotometric methods for determination of modafinil: the promising treatment for post-covid neurological syndrome

Table 2 Determination of modafinil in laboratory-prepared mixtures by the proposed spectrophotometric methods

Degradation Product %	RD	¹DD	MCR	RS
20%	99.07	100.38	101.47	100.37
30%	100.45	100.72	100.66	98.96
40%	98.36	100.39	100.79	100.00
50%	99.82	100.64	99.51	98.25
60%	99.12	99.21	99.73	98.55
70%	100.56	100.29	101.76	99.23
80%	104.76*	101.08	98.97	98.56
Mean	99.57	100.39	100.41	99.13
SD	0.864	0.586	1.041	0.792
RSD%	0.868	0.583	1.037	0.799