Detection of Nitrate and Sulfate Anions by Normal Raman Spectroscopy and SERS of Cationic-Coated, Silver Substrates
Keyword(s):
The use of normal Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS) of cationic-coated, silver substrates to detect nitrate and sulfate ions in aqueous environments is examined. For normal Raman spectroscopy using near-infrared excitation, a linear concentration response was observed with detection limits of 260 and 440 ppm for nitrate and sulfate, respectively. Detection limits in the low parts-per-million concentration range for these anions are achieved by using cationic-coated, silver SERS substrates. Adsorption of the anions on the cationic-coated SERS substrates is described by a Frumkin isotherm.
2020 ◽
Vol 240
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pp. 122225
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2015 ◽
Vol 42
(1)
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pp. 0115001
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1999 ◽
Vol 72
(12)
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pp. 2713-2717
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2007 ◽
Vol 61
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pp. 994-1000
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2017 ◽
Vol 65
(3)
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pp. 666-674
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