MXMF.Users.Handbook.V2.20.doc
LIT:MXUHB April 2003
11
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A.
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Basic Measurement & Performance Q&A
1. Measurement Samples
Below is a comparative measurement result of MX and Karl Fischer type analyzer.
Sample is a material that has little moisture.
1) Measurement condition
+ Sample : Plastic (PET)
+ Heating Temp. : 180C
+ Number of times : 5
+ Analyzers : Heating and drying method moisture analyzer : MX/MF (A&D)
Karl Fischer method moisture analyzer
: KF (tentative name) (K company)
2) Averaged Results
Sample
Weight
Moisture
Repeatability
Coefficient of
variation (CV)
Heating time
Analyzer
(
g
)
(
%
)
(
%
)
(
%
)
(
min
)
MX-50
10
0.298
0.0045
1.49
6.8
KF
0.3
0.3072
0.0065
2.13
19
(1) By the data there is no evident difference between the two analyzer’s results and it could be said that data
taken by A&D’s MX/MF can match a Karl Fischer type analyzer.
(2) As for accuracy, repeatability and coefficient variation, MX has less variance.
(3) A&D MX took much less time for measurement. MX took 6.8 min while KF took 19 min. Also, although not
shown in the table above KF requires 6 min of preparation and set-up of the unit and reagent, all of which
takes about 2 hours.
(4) In short, to measure moisture content of a material like PET with A&D’s MX/MF you can get a faster result
versus a KF. As for accuracy, MX gives even better results than KF. In operation MX requires a
remarkably less complicated preparation than KF would and it takes much less time to measure.
B.
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Data Results & Analysis
