Determination of Selenium Concentration of Rice in China and Effect of Fertilization of Selenite and Selenate on Selenium Content of Rice
A method of hydride generation atomic fluorescence spectrometry was applied to the determination of the selenium concentration of regular polished rice in China and selenium-enriched polished rice obtained by foliar application of selenium-enriched fertilizer in the forms of selenite and selenate. T...
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Published in | Journal of agricultural and food chemistry Vol. 50; no. 18; pp. 5128 - 5130 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
28.08.2002
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Subjects | |
Online Access | Get full text |
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Summary: | A method of hydride generation atomic fluorescence spectrometry was applied to the determination of the selenium concentration of regular polished rice in China and selenium-enriched polished rice obtained by foliar application of selenium-enriched fertilizer in the forms of selenite and selenate. The average selenium content of regular rice was 0.025 ± 0.011 μg g-1. On the basis of a daily dietary rice intake of 300−500 g suggested by the China Nutrition Society, the total selenium intake from regular rice was calculated to be 7.5−12.5 μg per person per day for an adult. The selenium contents of rice were significantly increased to 0.471−0.640 μg g-1 by foliar application of selenium-enriched fertilizer at rate of 20 g of Se ha-1 in the forms of sodium selenite and sodium selenate. The selenium content of rice by application of a fertilizer of selenate was 35.9% higher than that by a fertilizer of selenite, which showed that Se-enriched fertilizer in selenate exhibited greater efficiency in increasing Se content in rice products. The Se-enriched rice products can increase daily Se intake on average by 100−200 μg of Se per day by the consumption of 400 g of rice products if the Se level of rice products is controlled at 0.3−0.5 μg of Se g-1. Because rice is a staple food in China, selenium-enriched rice obtained by bioenrichment of selenium to increase the Se content of rice could be a good selenium source for the population in selenium-deficient regions. Keywords: Rice; selenium content; daily dietary selenium intake; selenium-enriched rice |
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Bibliography: | ark:/67375/TPS-D23QC5F6-0 istex:2A87A8BC5CDEA031D295FC454CE96D657F4A54EC ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0021-8561 1520-5118 |
DOI: | 10.1021/jf0201374 |