Fig. 2From: Application of gas flow headspace liquid phase micro extraction coupled with gas chromatography-mass spectrometry for determination of 4-methylimidazole in food samples employing experimental design optimizationEffect of different organic solvents on the extraction efficiency (sample volume 2.0 mL, temperature 110.0 °C; extraction time 45 min; 1.0 g of NaCl; gas flow rate 3.0 mL min−1; stirring speed 200 rpm; drop volume 2.0 μL; vial volume 10.0 mL; n = 3)Back to article page