Oxidative Coupling Assay for Mesalazine Determination in Pharmaceuticals and Spiked Human Plasma Utilizing Syringic Acid

Table 2

Intraday and interday precision.

Drug	Concentration (µg·mL^−1)	Intraday precision	Concentration found (µg·mL^−1) ± SD, RSD
			Interday precision
			Day 1	Day 2	Day 3
MSZ	10	9.939 ± 0.7, 0.61	10.17 ± 1.7, 2.7	10.33 ± 3.3, 1.5	9.86 ± 1.4, 4.45
	20	19.768 ± 1.2, 1.16	20.2 ± 1, 2.07	20.23 ± 1.15, 0.61	19.7 ± 1.5, 2.03