1. A Continuous Flow System for the Measurement of Ambient Nitrogen Oxides [NO + NO2] Using Rhodamine B Hydrazide as a Chemosensor
- Author
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Pandurangappa Malingappa and Venkataramanappa Yarradoddappa
- Subjects
Flow injection analysis ,lcsh:QD71-142 ,flow injection analysis ,rhodamine B hydrazide ,business.industry ,Inorganic chemistry ,Colorimeter ,lcsh:Analytical chemistry ,Parts-per notation ,amide bond ,Biochemistry ,Analytical Chemistry ,Catalysis ,Biotechnology ,Cuvette ,Medical Laboratory Technology ,Hydrolysis ,chemistry.chemical_compound ,chemistry ,ambient nitrogen oxides [NO + NO2] ,Molecule ,colorimeter ,Nitrogen dioxide ,business ,Original Research - Abstract
A new chemosensor has been used to monitor atmospheric nitrogen oxides [NO + NO2] at parts per billion (ppb) level. It is based on the catalytic reaction of nitrogen oxides with rhodamine B hydrazide (RBH) to produce a colored compound through the hydrolysis of the amide bond of the molecule. A simple colorimeter has been used to monitor atmospheric nitrogen dioxide at ppb level. The air samples were purged through a sampling cuvette containing RBH solution using peristaltic pump. The proposed method has been successfully applied to monitor the ambient nitrogen dioxide levels at traffic junction points within the city limits and the results obtained are compared with the standard Griess-Ilosvay method.
- Published
- 2014
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