Colorimetric screening of elevated urinary mercury levels by a novel Hg2+-selective probe of resorufin phosphinothioateopen access
- Authors
- Choi, Myung Gil; Yun, Byung Hoon; Kim, Hyeong Min; Ahn, Sangdoo; Chang, Suk-Kyu
- Issue Date
- Aug-2022
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.12, no.37, pp 24107 - 24113
- Pages
- 7
- Journal Title
- RSC ADVANCES
- Volume
- 12
- Number
- 37
- Start Page
- 24107
- End Page
- 24113
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58872
- DOI
- 10.1039/d2ra04093j
- ISSN
- 2046-2069
2046-2069
- Abstract
- Urinary mercury levels are the most reliable indicators of mercury exposure but identifying them requires complex techniques and heavy instruments. In this research, we reported a simple and convenient urinary mercury analysis method using a readily available office scanner. Probe MP-1 synthesized by the reaction of resorufin and dimethylthiophosphinoyl chloride revealed Hg2+-selective chromogenic and fluorescent signaling behavior. Signaling was realized through Hg2+-induced deprotection of the phosphinothioate protecting group in the resorufin-based probe MP-1 to yield the parent fluorochrome. A pronounced colorimetric response of color change from light yellow to pink alongside a turn-on type fluorescence enhancement was perceived exclusively toward Hg2+ ions over other metal ions and anions. The colorimetry provided a more advantageous ratiometric approach than the simple fluorometric analysis exhibiting an off-on type response, with a detection limit of 12 nM (2.4 ppb). The Hg2+ signaling of the MP-1 probe was not disturbed by the presence of coexisting metal ions and anions. The sensitive and convenient diagnosis of clinically important neurological symptoms and fatal inorganic mercury levels in urine was successfully demonstrated using a standard office scanner.
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