Thin-layer chromatography

Hi, I have a question about the polarity of four compounds. Why is the order of polarity caffeine> acetoaminophen> aspirin>ibuprofen make sense? in the order of decreasing polarity. thanks!

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... tube extraction” (SiSTEx), in which an organic solvent is placed in a thin silicone tube surrounded by the watery sample. Many of the pesticides ... residues in food samples. Further evaluation of low-pressure gas chromatography-mass spectrometry. Current methods of analysis for pesticide ...

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