Nanogold Resonance Rayleigh Scattering Method for Trace NO2- Based on P-Aminobenzene Sulfonic Acid-Α-Naphthylamine Colored Reaction
Keyword(s):
Azo Dye
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In acidic condition, NO2- combined with p-aminobenzene sulfonic acid by diazotization, and then reacted with α-naphthylamine to form purple azo dye. The resonance Rayleigh scattering (RRS) signal of the color system was detected by nanogold probe. Under the chosen conditions, the decreased RRS intensity ΔI (ΔI= Ib - I) at 500 nm was linear to the NO2- concentration in the range of 7.0×10-2-42.0μmol/L, with a regression equation of ΔI=6.72 C - 6.93, a correlation coefficient of 0.9982 and a detection limit of 2.6×10-4 mol/L NO2-.
2012 ◽
Vol 260-261
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pp. 701-706
2018 ◽
Vol 2018
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pp. 1-6
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Keyword(s):
2012 ◽
Vol 260-261
◽
pp. 815-819
2010 ◽
Vol 20
(12)
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pp. 1552-1556
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