Conversion of liquid laboratory wastes to a solid form: Precipitating osmic acid with tannic acid and gluten, and embedding cacodylic acid in starch paste

摘要

Laboratory wastes containing glutaraldehyde, paraformaldehyde, osmic acid and cacodylic acid were mixed with tannic acid and then with gluten. The osmium/tannin/gluten/aldehyde complex thus precipitated was separated as a cake by paper filtration. The filtrate containing cacodylic acid was supplemented with starch and warmed. This embedded filtrate in starch paste was air-dried together with the filter cake, and stored in a desiccator. The method also appears useful for storage of similar laboratory wastes.