A New Environmentally-Friendly Colorimetric Probe for Formaldehyde Gas Detection under Real Conditions

Abstract

A new environmentally-friendly, simple, selective and sensitive probe for detecting formaldehyde, based on naturally-occurring compounds, through either colorimetric or fluorescence changes, is described. The probe is able to detect formaldehyde in both solution and the gas phase with limits of detection of 0.24 mM and 0.7 ppm, respectively. The probe has been tested to study formaldehyde emission in contaminated real atmospheres. The supported probe is easy to use and to dispose, and is safe and suitable as an individual chemodosimeter.

Reaction-based fluorescent and chemiluminescent probes for formaldehyde detection and imaging

“…The detection was based on the Pictet-Spengler reaction and the dehydrogenation reaction of glycine and sucrose. 118 By using this method, FA gas could be detected on a silica gel plate and observed by naked eye with colorimetric change from white to yellow (Fig. 18).…”

Activity‐Based Fluorescent Probes for Sensing and Imaging of Reactive Carbonyl Species (RCSs)

“…Martinez‐Aquino et al . developed a simple probe ( Probe 2 ) for detecting FA based on Pictet‐Spengler reaction of primary amine followed by oxidation with LOD of 0.7 ppm and 0.24 mM respectively in gaseous as well as aqueous environments (Figure 2) [50] . Gangopadhyay et al .…”

Optical chemosensors for the gas phase detection of aldehydes: mechanism, material design, and application

“…Particularly for benzaldehyde, which has absorption spectrum almost overlapping with the MOF, the fluorescence quenching was found to be the strongest among all the aldehydes tested, which may lead to selective detection of this specific aldehyde. In 2018, a dual-mode sensor was prepared by Aquino et al 162 by immersing the silica gel plate in dopamine solution containing sucrose and glycine. Initially, the test plate was colorless and not fluorescent.…”