Report No DWI0792
REVIEW OF MATERIALS TESTING PROCEDURES LABORATORY TESTING REPORT (November 1995 to Spring 1997)
- Flavour and Odour
Assessments. If the agreed revisions for prEN 1420-1, (following the
first Formal Vote) are accepted at the 2nd Formal Vote stage, the
extraction sequence would appear to give similar or worse (fail safe)
result to the current UK method using the UK surface area/volume test
ratio and test criteria. On this basis the UK could probably accept the
extraction method in this draft.
outstanding problems relate to the different surface area to volume
ratios specified in prEN 1420-1 and how the results obtained using
these will be interpreted - the current BS 6920 test criteria couldn't
be applied in this case.
assessment, not a current UK requirement is a useful method for
screening out materials without undertaking the Taste Test (an
advantage in terms of both Health and Safety of Tasters considerations
- Chlorine Demand. Not
currently a formal UK test requirement, this test provides useful
additional information about the suitability of materials for use with
potable water. Any further consideration/progress. however, should be
delayed until a common approach to testing has been agreed in Europe.
- TOC Determinations. Now
a DWI CCM requirement, this test provides useful information about
migration from materials. It could easily be added as an additional
requirement to Part 4 of BS 6920 (GCMS General Scan method).
- Site Applied Products -
Alternative Cure Periods. The results reported confirm previous results
(from commercial testing) on the usefulness of the Taste of Water Test
in assessing the comparability of different cure conditions for Site
Copies of this report may be available as an Acrobat pdf download under the 'Pre 2000 Reports' heading on the DWI website.