Lookup NU author(s): Dr Gerry O'Brien
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Imported cassava roots can be found on retail sale in several Irish cities and towns. Fresh roots (n=36 roots) and peeled frozen root pieces (n=28 packs) were randomly purchased from five retailers in Belfast, Dublin and Limerick and assayed for cyanogenic potential (CNp). Total CNp of fresh root parenchyma varied from 37.5 to 242.9mgkg(-1) as HCN, dry weight basis - dwb), averaging 104.4mgkg(-1) HCN (dwb). Total CNp of frozen root parenchyma (n=28 packs) ranged from 28.5 to 258.6mgkg(-1) HCN (dwb), averaging 81.7mgkg(-1) HCN (dwb). Around 78% of fresh roots, and 93% of packs of frozen parenchyma, complied with the Codex Alimentarius definition of sweet' cassava, but most (86.1% and 64.3%, respectively) exceeded European Union NETTOX recommendations for total CNp. In around one-third of frozen parenchyma packs, nonglycosidic cyanogens accounted for 83-100% of total CNp. The toxicological implications are briefly discussed.
Author(s): O'Brien GM, Weir RR, Moody K, Liu PWS
Publication type: Article
Publication status: Published
Journal: International Journal of Food Science & Technology
Print publication date: 15/05/2013
ISSN (print): 0950-5423
ISSN (electronic): 1365-2621
Publisher: Wiley-Blackwell Publishing Ltd.
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