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Cyanogenic potential of fresh and frozen cassava on retail sale in three Irish cities: a snapshot survey

Lookup NU author(s): Dr Gerry O'Brien

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Abstract

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.


Publication metadata

Author(s): O'Brien GM, Weir RR, Moody K, Liu PWS

Publication type: Article

Publication status: Published

Journal: International Journal of Food Science & Technology

Year: 2013

Volume: 48

Issue: 9

Pages: 1815-1821

Print publication date: 15/05/2013

ISSN (print): 0950-5423

ISSN (electronic): 1365-2621

Publisher: Wiley-Blackwell Publishing Ltd.

URL: http://dx.doi.org/10.1111/ijfs.12155

DOI: 10.1111/ijfs.12155


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