A simple scanner-based colorimetric method for fluoride determination using Alfusone reagent
Masahide Hagiri, Shion Nomura, Erika Fukasawa, Takeshi Kato, Atsushi Manaka · 2026
Read A simple scanner-based colorimetric method for fluoride determination using Alfusone reagent by Masahide Hagiri, Shion Nomura, Erika Fukasawa, Takeshi Kato, Atsushi Manaka (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13563788.txt.
Description
Masahide Hagiri and four colleagues turn an office flatbed scanner into a water-testing lab for fluoride. Too little fluoride harms teeth; too much stains and damages them, so supplies need cheap checks. Standard methods demand dedicated instruments. Their 2026 method develops colour with Alfusone reagent in a 96-well plate, scans the plate, and reads the colour numerically in five colour systems at once. Many samples and standards run together on a single scan.
One channel, the hue value, proved most sensitive, detecting fluoride down to 0.086 milligrams per litre and quantifying from 0.29, comfortably below the World Health Organization guideline and Japan's drinking water standard. Spiked bottled and tap water came back near the true value on the red and one colour-opponent channel. The authors offer the attachment-free setup, built from shop-bought reagents and office gear, for small labs and field teams that cannot house a spectrometer.
Catalog record
| CREATOR | Masahide Hagiri, Shion Nomura, Erika Fukasawa, Takeshi Kato, Atsushi Manaka |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 24755 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |