ISO 6225-2:1990

Current Revision
Rubber, raw, natural - Determination of castor oil content - Part 2: Determination of total ricinoleic acid content by gas chromatography

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ISO 6225-2:1990

Rubber, raw, natural - Determination of castor oil content - Part 2: Determination of total ricinoleic acid content by gas chromatography

PUBLISH DATE 1990
ISO 6225-2:1990

Applicable to all grades of natural rubber.

The principle is based on:

  • Extraction of any free ricinoleic acid and conversion to the acetate of methyl ricinoleate.
  • Extraction of any castor oil glycerides also present, hydrolysis to ricinoleic acid, and conversion to the corresponding acetate of methyl ricinoleate.

Determination of the total acetate by gas chromatography by comparison either with a ricinoleic acid standard, or with ricinoleic acid prepared by hydrolysis of a castor oil standard.

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