CSA Group Cryolite, natural and artificial, and aluminium fluoride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method ISO 4280:1977

Description
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.
  • Cryolite, natural and artificial, and aluminium fluoride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method - ISO 4280:1977 - CSA Group
    CSA Group
Description
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.

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Cryolite, natural and artificial, and aluminium fluoride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method - ISO 4280:1977 - CSA Group
CSA Group
Toronto, Ontario, Canada
Cryolite, natural and artificial, and aluminium fluoride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method
ISO 4280:1977
Cryolite, natural and artificial, and aluminium fluoride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method ISO 4280:1977
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.

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.

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Technical Specifications

  CSA Group
Product Category Standards and Technical Documents
Product Number ISO 4280:1977
Product Name Cryolite, natural and artificial, and aluminium fluoride for industrial use - Determination of sulphate content - Barium sulphate gravimetric method
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