+1 888 608-7511
Need help finding a standard?
Help Desk
Cryolite, natural and artificial, and aluminium fluoride for industrial use -- Determination of sulphate content -- Barium sulphate gravimetric method
Applicable to products having a content, expressed as sulphur trioxide, equal to or more than 0.1 % (m/m).
Bases on alkaline fusion of a test portion with a mixture of sodium carbonate and boric acid.
Extraction of the fused mass with perchloric acid solution and precipitation of the sulphate ions with barium chloride in an acidified medium.
Filtration on a fine-texture, ashless filter paper (pore diameter approximately 0.4 to 1.0 m).
Calcination after drying in an electric oven at (850 ± 20) °C.
Weighing of the residue.
Failed to load document history.
| Publish Date | Document Id | Type | View |
|---|