Table 10-1: List Of Interferents - Teledyne 200E Instruction Manual

Theory of Operation
The influence of water vapor on the M200E measurement can be eliminated with an
optional, internal sample gas dryer. The concentrations of N
in ambient air measurements, hence provide a constant amount of quenching and the
interference of varying CO
Gas
Dilution: Viscosity of CO
them to collect in aperture of Critical Flow
Orifice altering flow rate of NO.
CO
rd
3 Body Quenching: CO
2
with NO * molecules absorbing excess energy
2
kinetically and preventing emission of
photons.
Some SO variants can also initiate a
X
chemiluminescence reaction upon exposure to
O producing excess light.
3
Chemically reacts with NH
generator to create (NH
sulfate) and NH
which form opaque white deposits on optical
filter window. Also forms highly corrosive
SO
X
HNO (Nitric Acid)
3
rd
3 Body quenching: SO
with NO * molecules absorbing excess energy
2
kinetically and preventing emission of
photons.
rd
3 Body quenching: H
with NO * molecules absorbing excess energy
2
kinetically and preventing emission of
photons.
Chemically reacts with NH
H 0
2
generator to create (NH
sulfate) and NH
which form opaque white deposits on optical
filter Window. Also forms highly corrosive
HNO (nitric acid)
3
Direct Interference: NH
and NO by the NO
NH
3
reacts with O
3
chemiluminescence.
Chemically reacts with H
generator to create (NH
sulfate) and NH
which form opaque white deposits on optical
filter window. Also forms highly corrosive
HNO (nitric acid).
3
In cases with excessively high CO
calibrated out by using calibration gases with a CO
very high and highly variable CO
160
amounts is negligible at low concentrations.
2

Table 10-1: List of Interferents

Interference Type
molecules causes
2
molecules collide
2
, O and H
3 2
) SO (ammonium
3 2 4
NO (ammonium nitrate)
3 2
molecules collide
X
O molecules collide
2
and SO in O
3 X
) SO (ammonium
3 2 4
NO (ammonium nitrate)
3 2
is converted to H
3
converter. Excess NO
2
in reaction cell creating excess
O, O and SO
2 2
) SO (ammonium
3 2 4
NO (ammonium nitrate)
3 2
concentrations (larger than 0.5%), the effect can be
2
concentrations will then be cause of measurable interfer-
2
Model 200E Instruction Manual
2
If high concentrations of CO
special calibration methods must be
performed to account for the affects of the
CO .
2
Contact T-API Customer Service depart-
ment for details.
Wavelengths of light produced by
chemiluminescence of SO
by the Optical Filter.
O in O Most of the ammonium sulfate and
2 3
ammonium nitrate produced is removed
from the sample gas by an air purifier
located between the O
reaction cell.
If high concentrations of SO
special calibration methods must be
performed to account for the affects of the
SO .
2
Contact T-API Customer Service depart-
ment for details.
Analyzer's operating in high humidity areas
must have some method of drying applied
to the sample gas supply (Section 5.7 for
more details).
Removed from the O
3
Perma Pure
more details).
O If a high concentration of NH
2
steps must be taken to remove the NH
from the sample gas prior to its entry into
the NO converter.
2
in O The Perma Pure
X 3
is sufficient for removing typical ambient
concentration levels of NH
content equal to the measured air. Only
2
and O are virtually constant
2
Rejection Method
are suspected,
2
are screened out
X
Generator and the
3
are suspected,
X
gas stream by the
3
®
Dryer (Section 10.2.6 for
is suspected,
3
®
dryer built into the M200E
.
3
044100102 Rev A
3