標準號：ISO 6225-2-1990
中文標準名稱：天然生膠 蓖麻油含量的測定 第2部分:蓖麻酸總含量的測定 氣相色譜法
英文標準名稱：Rubber, raw, natural; determination of castor oil content; part 2: determination of total ricinoleic acid content by gas chromatography
標準類型：B72
發布日期：1999/12/31 12:00:00
實施日期：1990/12/1 12:00:00
中國標準分類號：B72
國際標準分類號：6838
適用范圍：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.