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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Journal article

Analysis before and after cooking processes of a trace chlorpyrifos spiked in polished rice  [1991]

Lee, S.R. (Ewha Woman's University, Seoul, Korea); Mourer, C.R.; Shibamoto, T.;

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Polished rice grains were fortified with 500 ppb of chlorpyrifos. The fortified residues were analyzed by gas chromatography with a nitrogen-phosphorus detector or a Hall detector. Chlorpyrifos and its breakdown product 3,5,6-trichloro-2-pyridinol were recovered from fortified rice grains in the levels of 456 and 3.4 ppb, respectively. Washing rice grains with water removed approximately 60% of the chlorpyrifos residues. Fortified chlorpyrifos was found in cooked rice at a level of 130 ppb, which was approximately 30% of the original quantity. Acid treatment was required to remove chlorpyrifos bound to proteins or carbohydrates in the cooked rice

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Journal of agricultural and food chemistry (USA)

ISSN : 0021-8561