Selecting The Measurement Method - Endress+Hauser Analytik Jena multi EA 5000 Operating Manual

Operation
6.2

Selecting the measurement method

38
Begin the analysis with a standard solution and determine the daily factor. If the
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value measured for the standard solution differs by more than 20 % from the target
value, repeat the measurement. If required, look for the source of the fault. If re-
quired, re-calibrate the analysis system.
For examining very low element contents, examining a blind value is recommended
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before the daily factor. The blind value measurement cleans the analysis system.
Select the proper measurement method for each sample with the following table.
Some parameters can only be analyzed with horizontally or vertically installed furnaces
Horizontal: AOX, EC/OC
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Vertical: TOC, TIC, NPOC (in water)
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For other samples, the recommended measurement method depends on the nature of
the sample.
Sample
TS, TN, TX, TC in:
Organic solids, e.g., wax,
polymer
High-viscosity organic liq-
uids, gels and paste-like
samples, e.g., crude oil, as-
phalt, bitumen, tar
Bio-Diesel
Oils such as crude oil, paraf-
fin oil and vegetable oil
Volatile liquids such as pe-
troleum ether, methanol,
naphtha
Liquids or solids with high
element content
(> 100 mg/l)
Organic liquids with normal
viscosity, such as fuels, sol-
vents
EOX
Furnace installation po-
sition and sampling
Horizontal for
ABD
ABD with MMS
Horizontal for
Autoinjector
ABD
ABD with MMS 5000
Vertical for
Autoinjector and
Autoinjector AI-EA
MMS
Horizontal for
ABD
ABD with MMS
Vertical for
MMS
Autoinjector
multi EA 5000
Comment
ABD with flame sensor
For trace analysis:
Use 1 quartz glass boat
for all samples
MMS with temperature-
control unit in heating
mode for high-viscosity
liquids
ABD without MMS for
non-homogeneous sam-
ples
ABD with flame sensor
For trace analysis: must
be vertical
ABD with flame sensor
Sample (colorless, col-
ored) in n-hexane or pe-
troleum ether
Only colorless samples in
n-hexane