An optical sensor for the sensitive determination of formaldehyde gas based on chromotropic acid and 4-aminoazobenzene immobilized in a hydrophilic membrane

• DOI: 10.1039/d3an01056b
• Publication Date: 2023-07-28T13:41:55Z
• Authors: M. D. Fernández-R...; A. Moraga-Cabezas; Antonio L. Medina...; L. F. Capitán-Val...
• Keywords: Chromotropic acid

Optical sensor for highly selective determination of Formaldehyde gas at room temperature. Irreversible with a detection limit lower than the maximum exposure concentrations recommended by both WHO and OSHA. Good reproducibility only 5-min response time.