Luminol-based nitrogen dioxide detector
An instrument for the continuous detection of NO/sub 2/ in the sub-part-per-billion range is described. The instrument is based upon the chemiluminescent reaction between NO/sub 2/ in air and luminol (5-amino-2,3-dihydro-1,4-phthalazinedione) in alkaline solution. The present detector exhibits a 2-Hz response speed to changes of +/-20 ppB and a field detection limit of 30 parts per trillion. The instrumental technique has been expanded to measure NO by the catalytic oxidation of NO to NO/sub 2/ using CrO/sub 3/ on silica gel as the oxidizing agent; however, at low ambient NO concentrations some drift in the NO zero is observed. Interference from ambient O/sub 3/ is elimated by modification of the inlet system and luminol solution.
- Research Organization:
- Univ. of Michigan, Ann Arbor
- OSTI ID:
- 5130222
- Journal Information:
- Anal. Chem.; (United States), Vol. 55:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AIR
QUANTITATIVE CHEMICAL ANALYSIS
NITROGEN DIOXIDE
EXPERIMENTAL DATA
INTERFERING ELEMENTS
LUMINESCENCE
LUMINOL
OZONE
SENSITIVITY
AMINES
AZINES
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
FLUIDS
GASES
HETEROCYCLIC COMPOUNDS
INFORMATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHTHALAZINES
PYRIDAZINES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
400104 - Spectral Procedures- (-1987)