Standards Development

Scope

This International Standard describes the procedure for the determination of fluorine in copper, lead and zinc sulfide concentrates by sodium hydroxide fusion and fluoride ion selective electrode (FISE) detection. Fluoride ions are leached from the sodium hydroxide fusion and presented to the FISE. Potential interfering ions are masked by the use of a complexing agent and control of solution pH. If the aluminum content in the concentrate is up to 4,5 %, there is no effect of aluminum in this method. However, if the aluminum content in the concentrate exceeds 4,5 %, there is a possibility that it may affect the analytical results.

The method is applicable to fluorine in the following ranges:

 Copper concentrates 0,008 – 0,3 %

  Lead concentrates 0,005 – 0,2 %  

Zinc concentrates 0,005 – 0,1 %

WARNING — This Standard may involve hazardous materials and equipment. It is the responsibility of the user of this International Standard to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use.