Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:8
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 8
Character Range: 789651–790889

8                   Halides

8.1              Bromide

    8.1.1         Scope and application
This method (Adriano & Diner 1982, p. 449) is applicable to the determination of water-soluble bromides in soils, sediments and other solids.

    8.1.2         Principle
Most bromides in soils are considerably soluble and can be readily leached using water. In this method, bromide in the sample is extracted into water with a suitable soil:water ratio, which will depend on the bromide species and concentration present. Determination is by suitable APHA methods (APHA Methods 4500-Br and 4110).

8.2              Fluoride

    8.2.1         Scope and application
This method is applicable to the determination of total fluoride in plants, soils, sediments and other solids (ASTM D3269-96 (2001), McQuaker & Gurney 1977, ASTM D3270-00 (2006)).

    8.2.2         Principle
The sample is fused with sodium hydroxide at 600°C and a solution of the melt is analysed for fluoride.

Note 1: To avoid fluoride losses, do not use glassware to hold sample extracts for long periods; use plasticware as far as possible.

Note 2: This method is not appropriate for samples with high aluminium concentrations, which can cause negative interferences.