Potential Toxic Levels Of Cyanide In Cassava (Manihot Esculenta Crantz) Grown In Some Parts Of Kenya

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ABSTRACT

Cassava (Manihot esculenta Crantz) is a cyanogenic plant which is toxic when consumed without sufficient processing. Cassava is characterized by presence of linamarin a cyanogenic glycoside and when acted upon by an enzyme linamarase is hydrolysed into cyanohydrin which is further hydrolyzed to give hydrogen cyanide (HCN) which is toxic. This study aimed at determination of the levels of cyanide in the sweet cassava variety grown in five different geographical regions of Kenya namely Kisii, Kakamega, Thika, Nairobi and Kitui counties. The picrate paper method whose accuracy was higher compared to picrate solution and titration methods was used. The study also reports on variation of cyanide concentration with cultivar type and its concentration in different parts of cassava root. The concentration of cyanide varied significantly (p

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