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

9.0 REAGENTS
9.1 Purity - All reagents shall conform to specifications for reagent grade chemicals
of the American Chemical Society.
9.2 Zero Air - Ambient air purified by passing through an activated charcoal filter, or
by another appropriate manner (13).
10.0 PROCEDURE
10.1 Operate any commercial ozone analyzer following procedures given in the
manufacturer's manual. Perform the calibration as directed in Section 11.0.
Upon completion of a satisfactory calibration the analyzer is acceptable for ozone
monitoring.
11.0 CALIBRATION
11.1 Connect the ozone analyzer to the output manifold of the calibration system
(Figure-3). Check to insure proper operating parameters according to the
instrument manual.
11.2 Connect either a UV photometer (Section 8.4.2) to the output manifold. Check to
insure proper operating parameters according to the instrument manuals. Either
of these instruments can determine the true ozone concentration of the
calibration air streams.
11.2.1 As an alternative, the ozone concentration of the calibration air streams may be
determined by using the Neutral buffered Potassium Iodide method.
11.3 Zero Air - With the O3 lamp off, flush the system for about ten minutes to remove
residual O3. While the analyzers sample the zero air, record ten consecutive
digital display values. Calculate, for the ozone analyzer being calibrated and
either the UV photometer or ozone transfer standard, the sum and average of the
ten values and record. If an ozone transfer standard is used, note and record
temperature and pressure.
11.3.1 If the spectrophotometeric procedure is used, a manual sample of the zero air
should be taken. Record the ppm of ozone found, performing the calculations
described in the procedure.
11.4 Test Atmospheres - With the O3 lamp well equilibrated, adjust the O3
concentration to the range desired for a calibration point. Wait 10 minutes for
equilibration at each setting. Measure and record the analyzer digital outputs as
in the preceeding Section 11.3. Test atmospheres of approximately 80, 60, 40
and 20% of the range of the analyzer should be run for a calibration.
49