期刊
ANALYST
卷 138, 期 24, 页码 7303-7307出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3an01604h
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资金
- Florida Department of Health [1KN07]
- National Science Foundation [1300447]
- Directorate For Engineering [1300447] Funding Source: National Science Foundation
Paper indicators based on colorimetric assays are widely used for nitrite detection, but their application to liquids with strong colours is restricted. We report a novel paper indicator that allows for sensing nitrite by colorimetric assay, Raman spectroscopy, and electron paramagnetic resonance spectroscopy with non-overlapping signal wavelength ranges through non-contact means. The paper indicator was prepared by impregnating poly(4-aminostyrene), 2-naphthol and single-walled carbon nanotubes in a regular filter paper. All three ingredients were essential to realize the triple-modality sensing. This method is simple and inexpensive, and promises to have wider applicability than the existing paper indicators.
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