University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Nitrogen oxides

  • IUPAC Name: oxidoazanium
  • Molecular Formula: H3NO
  • InChI: InChI=1S/H3NO/c1-2/h1H3
  • InChI Key: GSWAOPJLTADLTN-UHFFFAOYSA-N

@ ChemSpider@ NIST@ PubChem

Citations 3

"Membrane-dialyser Injection Loop For Enhancing The Selectivity Of Anion-responsive Liquid-membrane Electrodes In Flow Systems. 1. Sensing System For NOx And Nitrite"
Anal. Chim. Acta 1986 Volume 186, Issue 1 Pages 71-80
Glenn B. Martin and M. E. Meyerhoff

Abstract: A semi-automated method is described for the determination of dissolved NOx or NO2-, with use of the receptor channel of a flow-through dialyser unit as the injection loop in a flow injection system; NO2 is trapped at a PTFE membrane in the dialyser, and converted into NO3- in the recipient/carrier stream (0.1% H2O2 and 1 µM-KNO3 in 5 mM phosphate buffer, pH 2.8). The NO3- is detected in a tubular electrode of PVC (0.89 mm i.d.) cast from a solution of PVC - 2-nitrophenyl octyl ether - Corning nitrate exchanger (6:13:1). The PTFE membrane prevents interfering ions from reaching the electrode, and the system is more sensitive and selective than conventional NOx sensors and NO3- electrodes alone. The detection limit for NO3- in the carrier stream is 1 µM.
Electrode Electrode Interferences Dialysis Teflon membrane

"Continuous-flow Performance Of Carbon Electrodes Modified With Immobilized Iron(II) - Iron(III) Centres. Amperometric Response To Nitrous Oxide, Nitric Oxide And Nitrogen Dioxide"
Talanta 1989 Volume 36, Issue 1-2 Pages 219-225
Mojtaba Bonakdar, Jianbo Yu and Horacio A. Mottola*

Abstract: Two chemically modified carbon electrodes were prepared; the first was a carbon paste electrode containing 55% of graphite and 10% of tris-(4,7-diphenyl-1,10-phenanthroline)iron perchlorate in light paraffin oil, and the second a vitreous-carbon electrode coated with tris-(5-amino-1,10-phenanthroline)iron perchlorate by oxidative electropolymerization in acetonitrile (122 cycles at 50 mV s-1 between 0 and +1.30 V vs. Ag - AgCl). The electrodes were used to record voltamperograms for N2O, NO and NO2. Samples (100 to 300 µL) were injected (100 to 200 h-1) into 0.1 M KCl (pH 4.00) as carrier electrolyte (2.0 mL min-1). The two electrodes showed a similar response to NO2, but neither was suitable for determining N2O or NO. The polymer-coated electrode was resistant to poisoning and gave a detection limit for NO2 of ~2 ppb at ±1.O V.
Electrode Electrode Electrode Electrode Amperometry Interferences PPB

"Comparison Of Spectrophotometric And Biological Assays For Nitric Oxide (NO) And Endothelium-derived Relaxing Factor (EDRF): Non-specificity Of The Diazotization Reaction For Nitric Oxide And Failure To Detect EDRF"
J. Pharmacol. Exp. Ther. 1990 Volume 252, Issue 3 Pages 922-928
WR Tracey, J Linden, MJ Peach and RA Johns

Abstract: Endothelium-derived relaxing factor (I) has been tentatively identified as NO, partially on the basis of chemical assays. An automated method was developed to monitor nitrogen oxides using continuous-flow spectrophotometric detection (diazotization reaction). The diazotization assay did not detect nitrogen oxides released from cultured endothelial cells by bradykinin, ATP or A 23187, but a bioassay readily detected I released. The diazotization reaction also lacks the specificity necessary to distinguish NO from other related substances.
Spectrophotometry Automation