A quick and inexpensive sample treatment, based on a singlestepmicroextraction with a SUPRAS made up of vesicles of octanoicacid, has been developed for the determination of PAH4 infoodstuffs belonging to different categories (smoked meat and fish,bivalve mollusks, and processed cereal-based food for infants) andfeaturing fat (0.3–12.1%), protein (2.5–18.5%) and carbohydrate(<1–12.4%) contents in a wide range. The two structure-derivedextraction properties of SUPRAS, namely different polarity regions
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