XRF provides an accurate, non-destructive measure of the elemental
composition of a sample as each chemical element has a characteristic
set of energy levels that produce a unique x-ray signature.

Drift correction samples are widely used to correct the day-to-day drift
of XRF instruments. Glass, owing to its very high stability and
versatility, is particularly well suited for this high-precision task.

GTS, with many years of experience and a proven track record in the
development and supply of customised glass compositions, is in a unique
position to tailor glasses to suit the requirements of individual
customers by supplying glasses from one-off bespoke samples to large
regular orders.

XRF Drift Correction Glasses, developed and manufactured by GTS, range
in composition from relatively simple (ie five to ten elements) to
complex glasses doped with many elements. These are normally provided as
discs, 5mm thick, 40mm diameter, with one face optically polished.
However, the new service by GTS is very flexible as each customer can
have custom-made dopant types and levels tailored to their needs.

All GTS glasses are processed to ensure homogeneity and reproducibility
and, with its own UKAS-accredited XRF facility Glass Technology Services
can furnish a Certificate of Analysis for each batch.

Notes to Editors:

1.   X-ray fluorescence technology is a simple and accurate
analytical method for determining the chemical composition of many types
of materials, including solid, liquid and powdered samples. It is
extremely economical, non-destructive and reliable, requiring little
sample preparation.

2. Glass Technology Services, is a subsidiary of British Glass
which operates independently and offers technical services and
consultancy serving customers who manufacture, work with, or use glass.

3. British Glass Manufacturers' Confederation represents the
interests of all sectors of the glass industry in the UK. Its main
activity is in representing the industry at European, national and local
level on a wide range of topical legislative issues. It also conducts
independent research into all aspects of glass production and
technology.

Further information can be obtained from:

Dr Brian Noble
Glass Technology Services Ltd
9 Churchill Way
Sheffield S35 2PY
Tel: 0114 290 1801
Fax: 0114 290 1851
Web: www.glass-ts.com