Cryolite, natural and artificial. Conventional test for evaluation of free fluorides content Ingestion-build-53008 This International Standard is intended

This International Standard is intended for filters having a rated flow of up to 200 l·h−1

BS 3900-D9 on determination of colour and colour difference is useful for:

expressions of results

helps to anticipate problems and ensures safe and quality food products

and testing and marking of relief devices

Cryolite, natural and artificial. Conventional test for evaluation of free fluorides content Ingestion-build-53008 This International Standard is intended1 Scope This Technical Report describes a conventional test for the evaluation of the free fluorides content of natural, artificial and recovered cryolite. This method is applicable to products having free fluorides content greater than 0,15 % (mass fraction) of AIF3 or 0,4 % (mass fraction) of NaF.