Table 2.

Wavelengths, retention times, standard deviation and coefficient of variation (n = 6)

Drug	Wavelength (nm)	Retention time (min)	Standard deviation (min)	Coefficient of variation (%)
Aspirin	229	2.175	0.003	0.14
Carbamazepine	215	2.713	0.008	0.37
Carvedilol	227	2.685	0.011	0.52
Dexamethasone	241	2.783	0.007	0.34
Diclofenac	275	3.161	0.006	0.26
Metamizole	259	1.020	0.011	0.49
Metoprolol	227	2.108	0.008	0.36
Naproxen	231	2.973	0.007	0.31
Paracetamol	241	0.648	0.009	0.43
Prednisolone	241	2.658	0.008	0.37
Propranolol	227	2.495	0.009	0.39
Salicylic acid	241	2.048	0.007	0.34
Sotalol	227	0.816	0.013	0.59