Environmental monitoring of trace metal pollutants using cellulosic-paper incorporating color change of azo-chromophore

Autor:	Siew Chun Low, Nur Atiah binti Azmi, Chyh Shyang Ong, Jit Kang Lim
Rok vydání:	2022
Předmět:	Ions Chitosan Health Toxicology and Mutagenesis Water General Medicine Resorcinols Pollution Trace Elements Lead Dithizone Metals Heavy Environmental Chemistry Environmental Pollutants Environmental Monitoring
Zdroj:	Environmental science and pollution research international. 29(47)
ISSN:	1614-7499
Popis:	An essential requirement for colorimetric paper-sensor is to allow the target analytes (heavy metal ions) to access the chromophore while maintaining strong chromophore immobilization on the porous substrate surface. This work evaluates the selection of sensitive chromophores (dithizone, 1-(2-pyridylazo) 2-naphthol and 4-(2-pyridylazo)-resorcinol) and their immobilization strategies on paper sensors. Dithizone (DTz) are capable of producing a significant color transition at unadjusted pH, observed by UV-Vis absorption spectroscopy and visible recognition. After immobilizing DTz on a paper substrate (cellulose acetate/chitosan substrate), the DTz-paper sensor showed a distinctive color change from blue-green to peach-pink upon reaction with Pb
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15cec055e5e5f5e751da11e0f5bd218d https://pubmed.ncbi.nlm.nih.gov/35604605 Zobrazit plný text záznamu Full text from SpringerLink