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. Author manuscript; available in PMC: 2012 Jan 1.

Published in final edited form as: Chromatographia. 2011 Jan 1;73(1-2):171–175. doi: 10.1007/s10337-010-1821-5

Table 2.

Precision of assay for hydrochlorothiazide and reserpine (n=5)

Conc.added (ng mL⁻¹)	Intra-day		Inter-day

	Mean Caculated	RSD (%)	Mean Caculated	RSD (%)
hydrochlorothiazide
200	195.7	1.91	191.6	1.22
500	480.6	0.98	460.1	1.35
1000	979.3	1.49	952.5	1.38

reserpine
200	178.4	1.61	166.7	2.12
500	445.0	1.26	444.3	2.53
1000	949.2	1.11	936.4	2.64