Ambient Air quality Monitoring Guidlines. - Maharashtra Pollution ...

ates constant. For each calibration point generated, calculate the NO2
concentration, and insure that the NO2 recorder responses are correct.
10.3.4.4 Determination of Converter Efficiency - Calculate the analyzer
converter efficiency as per Section 11.2 for the NO2 concentration
generated in Section 10.3.4.1. The converter efficiency must be 95%
or greater to be acceptable.
11.0 CALCULATIONS
11.1 Calculation of NO2 concentration
NO2 = NOx - NO
Where :
NOx = instrument reading of the NOx channel (10.3.4)
NO = instrument reading of the NO channel (10.3.4.1)
11.2 Calculation of Converter Efficiency (CE)
Where :
[NOx]
Converter Efficiency = ---------------- x 100
[NOx]GPT
[NOx] = instrument response for original NOx concentration prior to GPT
(10.3.4)
[NOx]GPT = instrument response for NOx during the GPT runs (10.3.4.1)
12.0 REFERENCES
1. A. FONTIJN, A.J. SABADELL AND R.J. RONCO. 1970. "Homogeneous
Chemiluminescent Measurement of Nitric Oxide with Ozone", Anal. Chem.,
42:575.
2. D.H. STEDMAN, E.E. DABY, F. STUHL AND H. NIKI. 1972. "Analysis of Ozone
and Nitric Oxide by a Chemiluminescent Method in Laboratory and Atmospheric
Studies of Photochemical Smog", J. Air Poll. Control Assoc., 22:260.
3. B.E. MARTIN, J.A. HODGESON AND R.K. STEVENS. 1972. "Detection of Nitric
Oxide Chemiluminescence at Atmospheric Pressure", Presented at 164 th
National ACS Meeting, New York City.
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