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GAS
INTERFERENCE TYPE
Some SO
variants can also initiate a
X
chemiluminescence reaction upon exposure to O
producing excess light.
Chemically reacts with NH
generator to create (NH
and NH
NO
(ammonium nitrate) which form opaque
3
2
SO
white deposits on optical filter window. Also forms
X
highly corrosive HNO
3
Body quenching: SO
rd
molecules absorbing excess energy kinetically and
preventing emission of photons.
3
rd
Body quenching: H
molecules absorbing excess energy kinetically and
preventing emission of light.
Water also reacts with NH
H
O
2
generator to create (NH
and NH
NO
(ammonium nitrate) which form opaque
3
2
white deposits on the optical filter window. This also
forms highly corrosive HNO
NH
also reacts with H
3
generator to create (NH
NH
and NH
NO
(ammonium nitrate) which form opaque
3
3
2
white deposits on optical filter window. Also forms
highly corrosive HNO
DIRECT INTERFERENCE
Some gases can directly alter the amount of light detected by the PMT due to chemilumi-
nescence in the reaction cell. This can either be a gas that undergoes chemiluminescence
by reacting with O
produces excess NO upstream of the reaction cell.
182
Teledyne API T200 NO/NO
3
, O
and H
O in O
3
2
2
3
)
SO
(ammonium sulfate)
3
2
4
(Nitric Acid)
3
molecules collide with NO
X
O molecules collide with NO
2
and SO
in the O
3
X
3
)
SO
(ammonium sulfate)
3
2
4
(nitric acid)
3
O, O
and SO
in the O
2
2
X
3
)
SO
(ammonium sulfate)
3
2
4
(nitric acid).
3
in the reaction cell or a gas that reacts with other compounds and
3
/NO
Analyzer with NumaView™ Software
2
x
REJECTION METHOD
Wavelengths of light produced by
chemiluminescence of SO
the Optical Filter.
Most of the ammonium sulfate and ammonium
nitrate produced is removed from the sample gas
by the Ozone cleanser located between the O
Generator and the reaction cell.
If high concentrations of SO
special calibration methods must be performed to
*
2
account for the effects of the SO
Contact Teledyne API's Technical Support
Department (Section 5.9) for details.
*
Analyzer's operating in high humidity areas must
2
have some drying applied to the sample gas (see
Section 2.3.2.6 for more details).
Water is effectively removed from the O
stream by the Nafion Dryer (Section 6.2.3.2 for
more details). We offer several Sample dryers for
the sample stream (see Section 2.3.2.6 for more
details).
The Sample dryer option is sufficient for removing
typical ambient concentration levels of NH
are screened out by
X
3
are suspected,
X
.
2
gas
3
.
3
083730200A DCN7962
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