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Ochratoxin A Burdens in Rice from Lagos Markets, Nigeria.

Williams, Akan B. (2008) Ochratoxin A Burdens in Rice from Lagos Markets, Nigeria. Journal of Environmental Science and Technology, 1 (2). pp. 80-84. ISSN 1994-7887

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Twenty five different brands of rice from Lagos markets in Nigeria were sampled and assessed for Ochratoxin A (OTA) contamination using High Performance Liquid Chromatography (HPLC). Samples were homogenized by grinding and extracted with 12.5 mL of 0.1 M phosphoric acid and 125 mL of methylene chloride. The extracts were cleaned-up with a syringe packed with acid washed Celite 545 column fitted to a solid phase extraction vacuum manifold and the analyte was eluted with methylene chloride/formic acid. The extract was pre-concentrated prior to HPLC analysis. Result indicated that OTA level in pic rice was non-detectable. Twenty four of the twenty five brands of rice analysed contained trace levels of OTA, the content of which ranged from 0.01 ng g-1 in miss lily parboiled rice to maximum concentration of 2.18 ng g-1 in rice king. The mean concentration was 0.34 ng g-1. The low level of contamination evident from the study suggested that consumption of rice available in Lagos markets was relatively safe. Results indicated that the levels of OTA in the rice samples were within acceptable limits. Recovery of Ochratoxin A in selected samples on spiking ranged from 84.6% - 92.5%, the mean recovery being 89.8%.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Pst Akan Williams
Date Deposited: 02 Mar 2015 09:08
Last Modified: 02 Mar 2015 09:08

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