Fig. 6From: 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 optimizationGC–MS–SIM chromatograms obtained by GF-HS-SDME of a caramel and b caramel spiked with 100.0 µg L−1 of 4-MeI; c energy drink and d energy drink spiked with 100.0 µg L−1 of 4-MeIBack to article page