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1 Introduction
874 Oven Sample Processor
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1 Introduction
1.1 Instrument description
The 874 Oven Sample Processor is used wherever the heating of a sample
and/or the thermal expulsion of moisture in solids or liquids is required. In
combination with a coulometric or volumetric KF titrator, the 874 Oven
Sample Processor is the ideal analysis system for water content determina-
tion in samples that contain disruptive components or from which mois-
ture can be removed only with difficulty.
One of its decisive advantages is reducing sample preparation to a mini-
mum. Thanks to the use of hermetically sealed sample vessels ("headspace
vials"), samples can be filled directly on-site. The PTFE-coated septa guar-
antee a constant, unaltered water content, even after prolonged holding
times.
The sample heated in the oven module releases its moisture in the form of
water vapor, which is conveyed into a measuring cell with the aid of a gas
flow. An air pump is installed to generate the gas flow. An inlet valve is
available for nitrogen or other inert gases. The moisture can be deter-
mined in the measuring cell either coulometrically or volumetrically using
Karl Fischer titration.
The 874 Oven Sample Processor is operated and controlled via the tiamo
computer software. This enables convenient programming of method
runs, ranging from the simple to the complex. The integration of the 874
Oven Sample Processor together with other instruments, e.g. with a coul-
ometer, within one user interface does not only allow for simple opera-
tion, but also for evaluation and storage of the measurement data from all
of the connected instruments in a single database.
1.1.1 Instrument versions
The 874 Oven Sample Processor is available in two versions with different
accessories.
￭ Version 2.874.0010 with accessories for the use of standard vials
(volume 6 mL).
￭ Version 2.874.0020 without accessories for the use of standard vials.
Appropriate accessories can be ordered for specific vessel sizes.
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