Application of Cerium (IV) as an Oxidimetric Agent for the Determination of Ethionamide in Pharmaceutical Formulations

Table 2

Evaluation of intraday and interday accuracy and precision.

Method	ETM; taken (mg or μg/mL)	⁢Intraday accuracy and precision ()			Interday accuracy and precision ()
		ETM; found; (mg or μg/mL)	RSD; %	RE; %	ETM; found (mg or μg/mL)	RSD; %	RE; %
Titrimetry	2.0	2.01	1.12	0.50	1.97	1.74	1.50
	4.0	3.94	1.35	1.50	4.03	2.03	0.75
	6.0	6.08	1.55	1.33	6.11	1.69	1.83
Spectrophotometry	1.0	0.98	1.41	2.00	1.02	1.81	2.00
	2.0	1.97	1.38	1.50	2.03	1.57	1.50
	3.0	3.04	1.65	1.33	2.95	1.93	1.67

Mean value of seven determinations; relative standard deviation (%); relative error (%).