Fault removal
multi EA 4000
140
8.6.3
TIC determination (automatic TIC solids module)
Lower results
Cause
Solution
Sample weight chosen too high
The sample weight should not exceed 50 mg, otherwise
the metered acid volume (400 µl) is not enough to fully
digest the carbonate or the acid volume cannot fully wet
the sample.
Sample not distributed evenly across the entire boat
length
The sample must be evenly distributed to allow the
sample to be completely wetted with acid.
Acid strength too weak
(long tailing of the measuring graph, measuring graph
does not return to baseline)
If the sample contains very stable carbonates (FeCO
3
) in
high quantities, the digestion speed with 40% H
3
PO
4
is
too slow. In this case
use a stronger acid instead (e.g. 25% HCl).
NOTICE!
Do not use HCl permanently.
Scattering measurements
Cause
Solution
Sample not distributed evenly across the entire boat
length
The sample must be evenly distributed to allow the
sample to be completely wetted with acid.
Sample matrix is hydrophobic
If it is difficult to wet the sample with acid, it is helpful
to cover the sample with annealed quartz sand to im-
prove the effect of the acid.
Sometimes hydrochloric acid wets better than phos-
phoric acid.
NOTICE!
Do not use HCl permanently.
8.6.4
TIC determination (manual TIC solids module)
Lower results
Cause
Solution
Acid strength too weak
(long tailing of the measuring graph, measuring graph
does not return to baseline within max. integration time
of 600 s)
If the sample contains very stable carbonates (FeCO
3
) in
high quantities, the digestion speed with 40% H
3
PO
4
is
too slow. In this case
use a stronger acid instead (e.g. 25% HCl).
NOTICE!
Do not use HCl permanently.
Summary of Contents for Analytik Jena multi EA 4000
Page 1: ...Operating Manual multi EA 4000 Elementary analyzer C S and Cl solids analysis...
Page 50: ...Commissioning multi EA 4000 50 Figure 32 multi EA 4000 C S Hose diagram...
Page 52: ...Commissioning multi EA 4000 52 Figure 33 multi EA 4000 Cl Hose diagram...
Page 54: ...Commissioning multi EA 4000 54 Figure 34 multi EA C S Cl for C S measurements Hose diagrams...
Page 55: ...multi EA 4000 Commissioning 55 Figure 35 multi EA 4000 C S Cl for Cl measurements...
Page 57: ...multi EA 4000 Commissioning 57 Figure 36 Automatic TIC solids module Hose diagrams...
Page 58: ...Commissioning multi EA 4000 58 Figure 37 multi EA 4000 C S with automatic TIC solids module...
Page 61: ...multi EA 4000 Commissioning 61 Figure 39 multi EA 4000 C S Cl with man TIC solids module...
