Analytik Jena multi EA 4000 User Manual

Fault removal
multi EA 4000 Version 01.16 117
9.6.3 TIC detection (automatic TIC solids module)
Lower results
Cause
Solution
− Weighted sample chosen too high
− Weighted sample should not exceed 50 mg,
otherwise the volume of metered acid (400 µl)
is not enough to completely replace the car-
bonate or the acid volume cannot fully wet the
sample.
− Sample not distributed evenly over
the entire length of the boat
− Sample must be distributed evenly to allow the
sample to be completely wetted with acid.
− Acid strength too weak (long trail-
ing of measuring graph, graph
does not return to base line)
− If the sample contains larger amounts of very
stable carbonates (e. g. FeCO
3
), the break-
down speed with 40% H
3
PO
4
is too slow. In
this case use stronger acid (e.g. 25% HCl).
Caution
HCl may not be used permanently.
Scattering measurements
Cause Solution
− Sample not distributed evenly over
the entire length of the boat
− Sample must be distributed evenly to allow the
sample to be completely wetted with acid.
− Sample matrix is too hydrophobic
− If it is difficult to wet the sample with acid, it
helps to cover the sample with annealed
quartz sand to improve the effect of the acid.
− The wetting properties of hydrochloric acid are
sometimes better than those of phosphoric ac-
id.
Caution
HCl may not be used permanently.
9.6.4 TIC detection (manual TIC solids module)
Lower results
Cause Solution
− Acid strength too weak (long trail-
ing of measuring graph, graph
does not return to base line with
max integration time of 600 s)
− If the sample contains larger amounts of very
stable carbonates (e. g. FeCO
3
), the break-
down speed with 40% H
3
PO
4
is too slow. In
this case use stronger acid (e.g. 25% HCl).
Caution
HCl may not be used permanently.

Analytik Jena multi EA 4000 Specifications

General

Brand	Analytik Jena
Model	multi EA 4000
Category	Measuring Instruments
Language	English