Organic residue analysis of potshards excavated from the Iron Age archaeological site of Kani-zirin, western Iran, was achieved with acidified methanol extraction and gas chromatography-mass spectrometry (GC-MS). The GC-MS data showed plant and animal commodities incorporated in the shards. Also, the investigations confirmed the presence of plant resin together with a tartrate ion within a group of the shards, suggesting a probable use of grape-related products. Evidence of resins from the Pinaceae family, as an exotic species in Iran, was evinced in several of the shards.

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