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Updated: May 30, 2025

Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
Published on: April 2, 2018
A suitable solvent for adsorption of poorly water-soluble substances onto silica gel in a ready biodegradability test
Yoshinari Takano1,2, Saki Takekoshi1, Kotaro Takano1
1Sumitomo Chemical Co., Ltd. Environmental Health Science Laboratory.
Abstract:
When a test substance is poorly water-soluble, it can be adsorbed onto silica gel to facilitate dispersibility in a ready biodegradability test. To uniformly adsorb the test substance onto silica gel, the substance is dissolved in a solvent and then mixed with the silica gel. It is desirable for the solvent to completely evaporate afterward. In this study, we identified n-hexane as a suitable solvent for this purpose. Furthermore, through fluorescence observation, we revealed that the test substance adsorbed onto the silica gel adhered to activated sludge flocs. This is thought to improve contact between the test substance and microorganisms, thereby accelerating biodegradation.
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