Membrane-based portable colorimetric gaseous chlorine sensing probe
Journal Publication ResearchOnline@JCUAbstract
Highly toxic chlorine gas imposes serious health risks in the workplace. The ability to on-site, real-time monitoring of instantaneous and time-weighted average (TWA) chlorine gas concentrations in a simple, sensitive, accurate, and reliable manner would be highly beneficial to improve workplace health and safety. Here, we propose and experimentally validate a gaseous chlorine detection principle based on a N,N-diethyl-p-phenylenediamine sulfate salt/Cl2 colorimetric reaction-controlled membrane process to regulate the gaseous chlorine transport across a gas-permeable membrane that enables the establishment of a time-resolved analytical relationship to quantify chlorine concentration by multidata points with dramatically enhanced accuracy and reliability. A gas-permeable membrane-based portable colorimetric gaseous chlorine sensing probe (MCSP) was designed and fabricated. The MCSP embedded the proposed analytical principle that is capable of real-time continuous monitoring of the instantaneous and TWA chlorine gas concentrations within an analytical range of 0.009–2.058 mg L–1 without the need for on-going calibration, which could be a useful analytical tool for managing the toxic chlorine gas-imposed health risks in workplaces.
Journal
Analytical Chemistry
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Volume
93
ISBN/ISSN
1520-6882
Edition
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Issue
2
Pages Count
8
Location
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Publisher
American Chemical Society
Publisher Url
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Publisher Location
N/A
Publish Date
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Url
N/A
Date
N/A
EISSN
N/A
DOI
10.1021/acs.analchem.0c02997