Thiamin, Riboflavin, and Nicotinic Acid Contents of Tropical Root Crops from the South Pacific

Bradbury, J H and Singh, U (1986) Thiamin, Riboflavin, and Nicotinic Acid Contents of Tropical Root Crops from the South Pacific. Journal of Food Science, 51 (6). pp. 1563-1564. ISSN 0022-1147

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The thiamin, riboflavin, and nicotinic acid contents of sweet potato (Ipomea batatas, taro (Colocasia esculenta), giant taro (Alocasia macrorrhiza), giant swamp taro (Cyrtosperma chamissonis), taro (Xan-thosoma spp), yam (Dioscorea alata and D. esculenta) were determined for fresh and 40°C dried material obtained from six South Pacific countries. Losses on drying at 40°C for 2-3 days were 10-15% for the three vitamins. Sweet potato contained the largest amount of thiamin (40-120 μg/100g fresh weight) and along with Colocasia esculenta and Xanthosoma spp. the largest amounts of nicotinic acid. The root crops provided inadequate amounts of thiamin, riboflavin, and nicotinic acid with values ranging from 12-123, 12-59 and 220-1310 Hg/100g fresh weight, respectively. Losses on cooking were about the same for all vitamins and root crops, with about a 20% loss on boiling (water retained) or baking and about a 40% loss on boiling (water discarded).

Item Type: Article
Uncontrolled Keywords: Sweet potato, Acid Contents, Tropical Root Crops, Thiamin
Subjects: Others
Depositing User: Mr Ramesh K
Date Deposited: 14 Sep 2016 08:02
Last Modified: 14 Sep 2016 08:02
Official URL:
Acknowledgement: This work is part of the ACIAR/ANU Program on Nutrition of Tropical Root Crops in the South Pacific, financed by the Australian Centre for International Agricultural Research (ACIAR). We thank the ICRISAT administration for granting sabbatical leave to author Singh, Dr. G. Persley of ACIAR for support, collaborators in the South Pacific, viz. Drs. J. Wilson (Western Samoa) and M. Levett and M.F. Quin (Papua New Guinea) and Messrs. P. Linton (Solomon Islands), P. Sivan (Fiji), F.S. Role (Tonga) and B, Ratieta (Kiribati) for providing samples of root crops and coworkers in our laboratory for assistance.
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