Purpose: To explore the time course effects in detecting DNA crosslinks with comet assay and to prove the feasibility of comet assay for detecting DNA crosslinks. Method: Hydrogen peroxide (H\-2O\-2) was used as standard DNA breaking agent, the relationship of time effects of DNA crosslinks in TK6 cells induced by formaldehyde (FA) was studied using comet assay. Meanwile, two kinds of DNA crosslinking agents (FA and mitomycine c) were tested and verified. Results: The length of DNA migration caused by H\-...