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Table 4 Showing intraday and interday reproducibility data

From: Simultaneous determination of methaqaulone, saccharin, paracetamol, and phenacetin in illicit drug samples by hplc

Compound Intraday recovery value (n=6) ± S.D Interday recovery value (3 days) ± S.D
Saccharin 100.02, 101.31, 100.98, 99.99, 104.53, 101.54 1.66 100.02, 104.34, 102.54 2.16
Phenacetin 99.99, 99.87, 101.72, 103.64, 101.73, 100.11 1.47 98.99, 101.76, 102.70 1.92
Paracetamol 101.43, 102.70, 101.11, 100.68, 101.99, 99.76 1.02 101.43, 104.37, 104.01 1.60
Methaqualone 100.54, 100.96, 102.73, 101.13, 100.02, 99.99 1.05 100.54, 98.67, 103.54 2.45