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Table 1 Levels of experimental condition applied for the 26 full-factorial design optimization

From: Screening of conditions controlling spectrophotometric sequential injection analysis

Experimental condition Minimum level Maximum level
Flow rate (μL/s) 15 30
Permanganate concentration (mmol/L) 1.0 5.0
Sulphuric acid concentration (mmol/L) 10 100
Permanganate volume (μL) 50 100
Sulphuric acid volume (μL) 30 60
Diclofenac volume (μL) 30 60