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Table 1 Experimental parameters of extraction and purification steps, factor levels tested in the factorial design, and optimum values for SCCP determination

From: Development of a method for the determination of SCCPs (short-chain chlorinated paraffins) in bivalve mollusk using Soxtec device followed by gas chromatography-triple quadrupole tandem mass spectrometry

Factor Low level High level Center Optimum
Sample amount (g) 2 4 3 4
Extractant volume (mL) 30 50 40 50
Boiling time (h) 1 2 1.5 2
Rinsing time (h) 0.5 1 0.75 1.5
Alumina amount (g) 4 8 6 8
Acid silica amount (g) 4 (30% H2SO4) 8 (30% H2SO4) 6 (30% H2SO4) 4 (15% H2SO4)
Elution volume (mL) 80 130 105 50