High-Performance Liquid Chromatography Determination of Meloxicam and Piroxicam with Ultraviolet Detection

Table 6

Interassay variability and recovery for meloxicam in milk .

Concentration added (ng/mL)	Concentration measured (ng/mL) (mean ± SD)	RSD (%)	Recovery (%)
15	17 ± 2	10.8	94
750	730 ± 68	9.2	91
1250	1233 ± 78	6.3	90
3000	2976 ± 131	4.4	95
7500	7500 ± 330	4.4	88

SD: standard deviation; : number of days; RSD: relative standard deviation.