abstract |
PROBLEM TO BE SOLVED: To provide a method and composition for removing a precipitate formed in a hematoxylin solution or reducing the formation of a precipitate. SOLUTION: A method using a washing solution characterized by a compound that initiates a process including, but not limited to, acidification of a waste liquid, chelation of metal ions in the waste liquid, reduction reaction, oxidation reaction, and metal salt addition reaction. And its composition. [Selection diagram] Fig. 3 |