Troubleshooting
multi EA 5000
118
13.10 Analytical problems during AOX, EOX and TX determination
Error
Possible cause
Remedy
Low results
¡
Incomplete HX for-
mation due too ex-
cessive halogen con-
tents, due to exces-
sive inorganically
bound halogen com-
pounds or due to
metal ions working as
catalysts (X
2
forma-
tion).
NOTICE! The analysis
system can become dam-
aged, e.g., by chlorine.
¡
Reduce sample size/
amount
¡
Dilute sample
¡
Metallic cations in
the sample lead to
halogen salt forma-
tion
¡
Dilute samples, if
possible
¡
Sample unsuitable for
vertical operation
mode (droplet forma-
tion)
¡
Use the horizontal
operation mode
¡
In vertical operation
mode: Quartz wool
not present or at the
wrong position in the
combustion tube
¡
Check the position of
the quartz wool, ad-
just as necessary
¡
Sample evaporates
before dosing
¡
Use a cooled sampler.
¡
Sample too viscous
too be drawn in with-
out air pockets
¡
Use the horizontal
operation mode and
dilute the sample, or
dose directly as a
solid.
¡
Inhomogeneous sam-
ple or sample con-
taining particles
¡
Homogenize sample
Results too high
¡
High sulfur and nitro-
gen content disrupt-
ing determination
¡
Dilute samples, if
possible
