A simple, azulene-based colorimetric probe for the detection of nitrite in water
Lloyd C. Murfin1, Carlos M. López-Alled2, Adam C. Sedgwick1, Jannis Wenk2,3(), Tony D. James1,2(), Simon E. Lewis1,2()
1. Department of Chemistry, University of Bath, Bath BA2 7AY, UK 2. Centre for Sustainable Chemical Technologies, University of Bath, Bath BA2 7AY, UK 3. Department of Chemical Engineering and Water Innovation and Research Centre (WIRC@Bath), University of Bath, Bath BA2 7AY, UK
We describe the synthesis and evaluation of an azulene-based chemodosimeter for nitrite. The probe was found to undergo two distinct color changes upon introduction of aqueous nitrite ion. A near-instant formation of a grey color provides a qualitative indication of the presence of nitrite, followed by the formation of a deep-yellow/orange color, the endpoint from which quantitative data can be derived. The azulene probe exhibits 1:1 stoichiometry of reaction with nitrite in water, and is selective for nitrite over other anions. The azulene probe was applied to determine nitrite content in cured meat, and compared with the British Standard testing procedure (Griess test). The value obtained from the azulene-based probe agreed closely with the standard test. Our procedure only requires the preparation of one standard solution, instead of the three required for the standard Griess test.
Corresponding Author(s):
Jannis Wenk,Tony D. James,Simon E. Lewis
引用本文:
. [J]. Frontiers of Chemical Science and Engineering, 2020, 14(1): 90-96.
Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis. A simple, azulene-based colorimetric probe for the detection of nitrite in water. Front. Chem. Sci. Eng., 2020, 14(1): 90-96.
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