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Standards Development
This international standard specifies a reference method for the determination of cyanide of cereals and pulses using gas chromatography. It applies to cassava and cassava products, sorghum, pulses and flaxseed.
Cyanide is a highly toxic substance, which can cause toxic reactions, harming the respiratory and
central nervous systems. More than 2,600 plants contain cyanide, with cassava, sorghum, lima beans,
and flaxseed having relative high levels. Many international organizations and countries have
established limits for cyanide. For example, the Codex Alimentarius Commission stipulates a cyanide
limit of 10 mg/kg in cassava flour, and the Food Standards Agency of Australia and New Zealand
specifies the same limit for cassava flakes. Currently, there are few international standards for
detecting cyanide in cereals and pulses. ISO 2164:1975 Pulses — Determination of glycosidic
hydrocyanic acid, is the only relevant ISO standard. However, this standard uses the method of
artificial chemical titration, which is difficult to operate and has a high limit of quantification.
The proposed standard establishes gas chromatography as the test method for cassava and cassava
products, sorghum, pulses and flaxseeds, meeting the need for cyanide detection in common cereals
and pulses.
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