BMC Chemistry

Table 8 Assay results for determination of DRT, CAFF and PAR in pure forms in the double divisor method:

From: Smart green spectrophotometric assay of the ternary mixture of drotaverine, caffeine and paracetamol in their pharmaceutical dosage form

Proposed method										Comparison method (79)
Parameters	DRT			CAFF			PAR			DRT		CAFF		PAR
Parameters	Amount taken µg/mL	Amount found µg/mL	% found ^b	Amount taken µg/mL	Amount found µg/mL	% found^b	Amount taken µg/mL	Amount found µg/mL	% found^b	Amount taken µg/mL	% found^b	Amount taken µg/mL	% found^b	Amount taken µg/mL	% found^b
	2	1.995	99.75	1.5	1.506	100.40	2	1.973	98.65	6.00	100.65	6.00	98.97	15.00	98.93
	4	3.942	98.55	3	3.025	100.83	5	4.94	98.80	8.00	98.60	8.00	98.29	20.00	101.90
	8	7.949	99.36	6	6.001	100.00	10	9.974	99.74	10.00	100.52	10.00	101.17	30.00	100.93
	10	10.009	100.09	9	8.912	99.02	20	20.087	100.44
	14	14.210	101.72	12	11.886	99.05	30	30.28	100.93
	20	19.85	99.30	15	15.051	100.34	40	39.78	99.45
Mean			99.79			99.94			99.66
± SD	1.07			0.75			0.89
t^a	0.87 (2.36)			0.64 (2.36)			1.17 (2.36)
F^a	3.52 (19)			13.15 (19)			2.84 (5.76)

^aThe figures between parenthesis are the tabulated t and F values, respectively are at P = 0.05 [81]
^bEach result was the average of three separate determinations

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