1989
DOI: 10.1111/j.1439-0442.1989.tb00727.x
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Purification Procedure for the Determination of Niacin Vitameres in Gastrointestinal Contents and Blood

Abstract: Summary A solid phase extraction procedure for subsequent simultaneous HPLC analysis of free nicotinic acid (NIA) and nicotinamide (NAM) in dried or liquid rumen and gastrointestinal contents from sheep is described. Twenty‐five mg dried samples were suspended in 1.0 ml of 0.1 mol/l Li2SO4 and centrifuged. The supernatants were passed through two 500 mg solid phase extraction columns (Bond Elut NH2 and Sep Pak C18), mounted in series, and eluted by a four step pH gradient procedure. Recoveries of the two vitam… Show more

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Cited by 4 publications
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