When individual microorganisms were used torelease bound pesticide residues, it was ussually not take into fullaccountwhether the autoclaving method could lead to the releaseof bound residues. The soil containing bound14C-chlorsulfuron residues was treated with an autoclavein this study. The results reveal that the bound14C-chlorsulfuron residue can be released from the soilwhen treated with the autoclave and the release rate canbe remarkably enhanced by adding water into the soil whensubjected to such treatment. A TLC analysis showed that thereleased 14C-residue was one of the degraded products of14C-chlorsulfuron. After derivatization and analysis using theGC-MS, the released 14C-residue was tentatively identifiedas 2-amino-4-hydroxyl-6-methyl-1,3,5-triazine.