Last update: 2010-02-01
XRF Analysis of Polymers
great variety of Polymer samples ...
analysed in 1992 using UniQuant®2 and comprised:
- granules (loose
and hot pressed)
- synthetic yarn
- a piece of carpet
- odd shaped pieces of plastic
There has been no sample preparation, except for the hot pressed
The results on loose granules are so close to those on hot
pressed pellets that
analysing loose granules directly seems to be the preferred
The total measuring time was 15 minutes per
sample. In routine practice, the measuring
program may be tailored and the total measuring time would
then be less than 10 minutes.
We here only show some results for 2 Polyester
specimen, both of the same material..
One is measured as loose granules on a supporting film in
vacuum, the other is
hot pressed to a tablet and measured without supporting film.
The concentrations of
the elements Ti, P, Sb and Mn had been previously analysed
by XRF based on a
conventional calibration line.
results in ppm (mg/kg)
By conventional UniQuant2
pressed pressed loose Estimated
pellet pellet granules Max. Error
Ti 2950 3500 3500 200
P 43 58 48 5
Sb 290 300 250 30
Mn 80 84 86 8