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	<front>
		<journal-meta>
			<journal-id journal-id-type="publisher-id">pnut</journal-id>
			<journal-id journal-id-type="allenpress-id">pnut</journal-id>
			<journal-title>Peanut Science</journal-title>
			<issn pub-type="ppub">0095-3679</issn>
			<issn pub-type="active">0095-3679</issn>
			<publisher>
				<publisher-name>American Peanut Research and Education Society</publisher-name>
			</publisher>
		</journal-meta>
		<article-meta>
			<article-id pub-id-type="doi">10.3146/i0095-3679-25-2-13</article-id>
			<article-categories>
				<subj-group subj-group-type="heading">
					<subject>Articles</subject>
				</subj-group>
			</article-categories>
			<title-group>
				<article-title>Application of Direct Solvent Extraction to the LC Quantification of Vitamin E in Peanuts, Peanut Butter, and Selected Nuts</article-title>
			</title-group>
			<contrib-group>
				<contrib contrib-type="author" xlink:type="simple">
					<name name-style="western">
						<given-names>J.</given-names><x xml:space="preserve"> </x>
						<surname>Lee</surname>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1</sup></xref><x xml:space="preserve">, </x>
				</contrib>
				<contrib contrib-type="author" xlink:type="simple">
					<name name-style="western">
						<given-names>W. O.</given-names><x xml:space="preserve"> </x>
						<surname>Landen</surname><x xml:space="preserve"> </x>
						<suffix>Jr.</suffix>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1</sup></xref><x xml:space="preserve">, </x>
				</contrib>
				<contrib contrib-type="author" xlink:type="simple">
					<name name-style="western">
						<given-names>R. D.</given-names><x xml:space="preserve"> </x>
						<surname>Phillips</surname>
					</name>
					<xref ref-type="aff" rid="aff2"><sup>2</sup></xref><x xml:space="preserve">, and </x>
				</contrib>
				<contrib contrib-type="author" xlink:type="simple">
					<name name-style="western">
						<given-names>R. R.</given-names><x xml:space="preserve"> </x>
						<surname>Eitenmiller</surname>
					</name>
					<xref ref-type="aff" rid="aff1"><sup>1,</sup></xref>
					<xref ref-type="corresp" rid="cor1">&ast;</xref>
				</contrib>
				
					<aff id="aff1">
					<label><sup>1</sup></label>Postdoc. Assoc.; Res. Assoc.; and Prof. respectively, Dept. of Food Sci. and Tech., Univ. of Georgia, Athens, GA 30602
				</aff>
				
					<aff id="aff2">
					<label><sup>2</sup></label>Prof., Center for Food Safety and Quality Enhancement, Dept. of Food Sci. and Tech., Univ. of Georgia, Griffin, GA 30223
				</aff>
			</contrib-group>
			<author-notes>
				<corresp id="cor1">&ast;Corresponding author.</corresp>
			</author-notes>
			<pub-date pub-type="ppub">
				<month>7</month>
				<year>1998</year>
			</pub-date>
			<volume>25</volume>
			<issue>2</issue>
			<fpage>123</fpage>
			<lpage>128</lpage>
			<permissions>
				<copyright-statement>American Peanut Research and Education Society</copyright-statement>
				<copyright-year>1998</copyright-year>
				<copyright-holder>American Peanut Research and Education Society</copyright-holder>
			</permissions>
			<related-article related-article-type="pdf" xlink:href="i0095-3679-25-2-13.pdf" xlink:type="simple"></related-article>
			<abstract>
				<title>Abstract</title>
				<p>Direct solvent extraction with hexane:ethyl acetate (90:10, v/v), saponification, and Soxhlet extraction with hexane were evaluated for their usefulness as extraction methods to determine vitamin E in peanuts and peanut butters. The direct solvent extraction procedure yielded higher values for each tocopherol homolog in peanut and peanut butter compared to the other methods. Coupling of the rapid, direct solvent extraction with normal phase chromatography on Si 60 provides a highly reproducible procedure to quantitate vitamin E in peanuts and peanut products. The overall &percnt; recoveries (means &plusmn; S.D.) of this study for &alpha;-, &beta;-, &gamma;-, and &delta;-tocopherol were 99.9 &plusmn; 3.29, 100.4 &plusmn; 11.7, 98.9 &plusmn; 5.94, and 100.3 &plusmn; 4.87, respectively. Limits of detection and limits of quantitation were 0.21, 0.06, 0.11, and 0.08 ng and 0.39, 0.14, 0.23, and 0.13 ng, respectively, for &alpha;-, &beta;-, &gamma;-, and &delta;-tocopherol. Repeatability, reproducibility, and accuracy of the methods were excellent with &percnt; CVs for accuracy of 1.19 (&alpha;-T), 1.55 (&gamma;-T), and 2.69 (&delta;-T). Accuracy was not acceptable for &beta;-T due to its extremely low concentration in the peanut and because peak purity was not obtained for &beta;-T. The method was applied to other seeds with good success. Major homologs were &gamma;-T in peanuts, pecans, cashews, walnuts, and pistachio; &alpha;-T in almonds; and &alpha;-T3 in macadamia.</p>
			</abstract>
			<kwd-group>
				<title>Key Words</title>
				<kwd>HPLC</kwd><x xml:space="preserve">; </x><x xml:space="preserve">, </x>
				<kwd>nutrition</kwd><x xml:space="preserve">; </x><x xml:space="preserve">, </x>
				<kwd>saponification</kwd><x xml:space="preserve">; </x><x xml:space="preserve">, </x>
				<kwd>seeds</kwd><x xml:space="preserve">; </x><x xml:space="preserve">, </x>
				<kwd>Soxhlet extraction</kwd>
			</kwd-group>
			<counts>
				<page-count count="6"></page-count>
			</counts>
		</article-meta>
	</front>
</article>
