Our Stability Measuring Instruments
are now available in the third generation and are well approved in
food industry and polymer industry.
They are completely PC controlled and offer extensive features
for data archiving and data reprocessing.
Methodology
With Metrohm Stability Measuring Instruments, different types of
samples are exposed to air or inert gas at elevated
temperatures.
Due to oxidative or thermal decomposition volatile reaction
products are formed during this reaction process and are trapped in
an absorption vessel with distilled water and are detected using
conductivity measurement.
Determination of the oxidative stability of fats and
oils
with the 743
Rancimat
The determination of the oxidative stability in natural fats and
oils is a method for quality control in the food industry.
The Rancimat method has been developed as an automated version of
the extremely demanding AOM method (active oxygen method) for the
determination of the induction time of fats and oils.
In this method the highly volatile organic acids produced by
autoxidation are absorbed in water and used to indicate the
induction time.
In the course of time this method has become well established and
has been included in various national and international
standards.
Determination of thermal stability of PVC
with the 763
PVC Thermomat
Chlorinated plastics decompose at elevated temperatures with the
release of gaseous HCl.
These thermal decomposition products are blown off by a stream of
inert nitrogen into the measuring cell filled with distilled
water.
The thermal stability of the PVC materials is determined by
measuring the conductivity in the measuring cell.
Instruments
>> More Details at Metrohm
Switzerland
