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.

[1]  Y. Maeda,et al.  Chemiluminescence method for the determination of nitrogen dioxide , 1980 .

[2]  F. Black,et al.  Chemiluminescent method for analysis of nitrogen compounds in mobile source emissions nitric oxide, nitrogen dioxide, and ammonia , 1973 .

[3]  P. N. Clough,et al.  Mechanism of chemiluminescent reaction between nitric oxide and ozone , 1967 .

[4]  G. Likens,et al.  Acid precipitation: The importance of nitric acid , 1981 .

[5]  A. Fontijn,et al.  Homogeneous chemiluminescent measurement of nitric oxide with ozone. Implications for continuous selective monitoring of gaseous air pollutants , 1970 .

[6]  G. Kok,et al.  Chemiluminescent method for determination of hydrogen peroxide in the ambient atmosphere , 1978 .

[7]  B. Thrush,et al.  Kinetics of the chemiluminescent reaction between nitric oxide and ozone , 1964 .

[8]  E. Kothny,et al.  Quantitative analysis of nitric oxide in presence of nitrogen dioxide at atmospheric concentrations , 1974 .

[9]  R. B. Harvey,et al.  Measurements of oxides of nitrogen and nitric acid in clean air , 1980 .

[10]  W. Seitz.  [38] Chemiluminescence detection of enzymically generated peroxide , 1978 .

[11]  D. Kley,et al.  On the origin of tropospheric ozone , 1980 .

[12]  A. Winer,et al.  Ambient air measurements of hydrogen peroxide in the California South Coast Air Basin , 1978 .

[13]  Arthur M. Winer,et al.  RESPONSE OF COMMERCIAL CHEMILUMINESCENT NO-NO2 ANALYSERS TO OTHER NITROGEN-CONTAINING COMPOUNDS , 1974 .