Table 5 Precision data for the assay of FAV and APX in their raw materials.

FAV			APX
Sample concentration (ng mL⁻¹)	% Recovery^a (Intraday precision)	% Recovery* (inter-day precision)	Sample concentration (μg mL⁻¹)	% Recovery* (Intraday precision)	% Recovery* (inter-day precision)
4	99.52	99.14	0.4	100.03	98.28
	98.37	97.91		100.65	99.85
	101.82	99.91		100.65	101.45
X′ ± S.D	99.88 ± 1.76	98.98 ± 1.00	X′ ± S.D	100.45 ± 0.36	99.85 ± 1.60
% RSD	1.76	1.01	% RSD	0.36	1.60
% Error	1.02	0.59	% Error	0.21	0.92
6	98.39	98.00	0.6	98.93	98.23
	98.11	97.88		99.03	98.50
	98.51	98.26		99.57	99.03
X′ ± S.D	98.34 ± 0.21	98.05 ± 0.19	X′ ± S.D	99.18 ± 0.34	98.58 ± 0.41
% RSD	0.21	0.20	% RSD	0.35	0.41
% Error	0.12	0.11	% Error	0.20	0.24
8	100.12	99.73	0.8	99.93	100.61
	99.93	99.93		99.66	100.7
	99.54	100.88		101.01	101.15
X′ ± S.D	99.86 ± 0.30	100.18 ± 0.61	X′ ± S.D	100.20 ± 0.71	100.82 ± 0.29
% RSD	0.30	0.61	% RSD	0.71	0.29
% Error	0.17	0.35	% Error	0.41	0.17

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