Determination of Residual Nonsteroidal Anti-Inflammatory Drugs in Aqueous Sample Using Magnetic Nanoparticles Modified with Cetyltrimethylammonium Bromide by High Performance Liquid Chromatography

Table 2

Average relative standard deviation (RSD) for spiked drugs (𝑛=6).

Analyte	25 ng·mL^−1	50 ng·mL^−1	200 ng·mL^−1
DICLO	10.94%	9.83%	8.16%
INDO	7.02%	6.61%	4.45%
IBU	5.86%	3.98%	3.85%
NAP	5.53%	4.11%	3.73%