<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0121-4004</journal-id>
<journal-title><![CDATA[Vitae]]></journal-title>
<abbrev-journal-title><![CDATA[Vitae]]></abbrev-journal-title>
<issn>0121-4004</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Química Farmacéutica, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-40042016000300194</article-id>
<article-id pub-id-type="doi">10.17533/udea.vitae.v23n3a05</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Comparison and validation of a fast method for the extraction and quantification of &#945;-Linolenic, Eicosapentaenoic, and Docosahexaenoic fatty acids]]></article-title>
<article-title xml:lang="es"><![CDATA[Comparación y validación de un método rápido para la extracción y cuantificación de ácidos grasos &#945;-Linolénico, Eicosapentaenoico y Docosahexaenoico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oviedo-Castrillón]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintero-Laverde]]></surname>
<given-names><![CDATA[Natalia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velásquez-Rodríguez]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Marín]]></surname>
<given-names><![CDATA[Beatriz Estella]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Antioquia University (UdeA) Nutrition School ]]></institution>
<addr-line><![CDATA[Medellin ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Antioquia University  ]]></institution>
<addr-line><![CDATA[Medellin ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Antioquia University (UdeA)  ]]></institution>
<addr-line><![CDATA[Medellin ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Antioquia University (UdeA) Nutrition School ]]></institution>
<addr-line><![CDATA[Medellin ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>23</volume>
<numero>3</numero>
<fpage>194</fpage>
<lpage>201</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-40042016000300194&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-40042016000300194&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-40042016000300194&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  Omega 3 family fatty acids are currently widely studied for the diverse effects they have on cardiovascular disease risk factors. Seafood is the main natural source of these compounds.  Objetives:  In this paper the accuracy is verified on the fat extraction in fish, between two methods, using one of the most employees as it is the Bligh &amp; Dyer since 1959, compared with SOXTEC, one more updated method with more modern equipment and validated quantification method for some omega 3 fatty acids by gas chromatography.  Methods:  Fat extraction was performed by SOXTEC and Bligh &amp; Dyer with the use of a Certified Reference Material (SRM 1946). After having assessed the accuracy of both systems, a quantification method of &#945;-Linolenic, Eicosapentaenoic, and Docosahexaenoic fatty acids was validated through gas chromatography.  Results:  It was found that the method proposed by Bligh &amp; Dyer in 1959 is the most accurate because it showed better recovery percentages. Also, it was found that the quantification validation method of the most important omega 3 fatty acids complies with every parameter assessed throughout the validation.  Conclusions:  In conclusion SOXTEC being a more modern method which uses the latest technology, the Bligh &amp; Dyer is the most effective method for removing fat in fish and gas chromatography allows quantification of fatty acids with precision and accuracy as meets the evaluated parameters.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  Los ácidos grasos de la familia omega 3 son ampliamente estudiados actualmente por los diversos efectos que tienen sobre los factores de riesgo de la enfermedad cardiovascular. La comida de mar es la principal fuente natural de estos compuestos.  Objetivos:  En este artículo se verifico la exactitud en la extracción de grasa en pescado, entre dos métodos, utilizando uno de los más empleados como es el B&amp;D de 1959, comparado con el SOXTEC, un método más actualizado con equipos más modernos y se validó el método de cuantificación de algunos AG w3 por cromatografía de gases.  Métodos:  Se realizó la extracción de grasa por los métodos SOXTEC y Bligh &amp; Dyer, con la utilización de un Material de Referencia Certificado (SMR 1946), para evaluar la exactitud, posteriormente se validó un método de cuantificación de los ácidos grasos &#945;-Linolénico, Eicosapentaenoico y Docosahexaenoico por cromatografía de gases.  Resultados:  Se encontró que el método propuesto por Bligh &amp; Dyer en 1959 fue el más exacto, ya que mostró mejores porcentajes de recuperación. También se encontró que la validación del método de cuantificación de los ácidos grasos más importantes de la familia omega 3 cumplió con todos los parámetros evaluados en la validación.  Conclusión:  En conclusión siendo el SOXTEC un método más moderno el cual emplea equipos de última tecnología, es el Bligh &amp; Dyer el método más efectivo para la extracción de la grasa en pescado y la cromatografía de gases permite la cuantificación de AG con precisión y exactitud, ya que cumple con los parámetros evaluados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Fatty acids]]></kwd>
<kwd lng="en"><![CDATA[gas chromatography]]></kwd>
<kwd lng="en"><![CDATA[Bligh &amp; Dyer]]></kwd>
<kwd lng="en"><![CDATA[EPA]]></kwd>
<kwd lng="en"><![CDATA[DHA]]></kwd>
<kwd lng="en"><![CDATA[omega 3]]></kwd>
<kwd lng="es"><![CDATA[Ácidos grasos]]></kwd>
<kwd lng="es"><![CDATA[Cromatografía de gases]]></kwd>
<kwd lng="es"><![CDATA[Bligh &amp; Dyer]]></kwd>
<kwd lng="es"><![CDATA[EPA]]></kwd>
<kwd lng="es"><![CDATA[DHA]]></kwd>
<kwd lng="es"><![CDATA[Omega 3]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Cardioprotective mechanism of omega-3 polyunsaturated fatty acids]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Endo]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Arita]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[J Cardiol]]></source>
<year>2015</year>
<page-range>6-11</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Omega-3 fatty acids and metabolic syndrome: effe|cts and emerging mechanisms of action]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Poudyal]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Panchal]]></surname>
<given-names><![CDATA[SK]]></given-names>
</name>
<name>
<surname><![CDATA[Diwan V]]></surname>
<given-names><![CDATA[BL]]></given-names>
</name>
</person-group>
<source><![CDATA[Prog Lipid Res]]></source>
<year>2011</year>
<volume>50</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>372-87</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Role of &#969;3 Longchain Polyunsaturated Fatty Acids in Reducing Cardio-Metabolic Risk Factors]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abeywardena MY]]></surname>
<given-names><![CDATA[PG]]></given-names>
</name>
</person-group>
<source><![CDATA[Endocr Metab Immune Disord Drug Targets]]></source>
<year>2011</year>
<volume>11</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>232-46</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Omega-3 fatty acids and cardiovascular disease Effects on risk factors, molecular pathways, and clinical events]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mozaffarian]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[JHY]]></given-names>
</name>
</person-group>
<source><![CDATA[J Am Coll Cardiol]]></source>
<year>2011</year>
<volume>58</volume>
<numero>20</numero>
<issue>20</issue>
<page-range>2047-67</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Statistical evaluation of fatty acid profile and cholesterol content in fish (common carp) lipids obtained by different sample preparation procedures]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Spiric]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Trbovic]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Vranic]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Djinovic]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Petronijevic R M-S]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<source><![CDATA[Anal Chim Acta]]></source>
<year>2010</year>
<volume>672</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>66-71</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Optimization of the GC method for routine analysis of the fatty acid profile in several food samples]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Petrovi&#263;]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kezi&#263; N B]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<source><![CDATA[Food Chem]]></source>
<year>2010</year>
<volume>122</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>285-91</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Mechanisms of Action of (n-3) Fatty Acids]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calder]]></surname>
<given-names><![CDATA[PC]]></given-names>
</name>
</person-group>
<source><![CDATA[J Nutr]]></source>
<year>2012</year>
<volume>142</volume>
<page-range>592s- 599s</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Production of EPA and DHA in aquatic ecosystems and their transfer to the land]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gladyshev]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
<name>
<surname><![CDATA[Sushchik]]></surname>
<given-names><![CDATA[NN]]></given-names>
</name>
<name>
<surname><![CDATA[Makhutova]]></surname>
<given-names><![CDATA[ON]]></given-names>
</name>
</person-group>
<source><![CDATA[Prostaglandins Other Lipid Mediat]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Comparison of different methods for total lipid quantification in meat and meat products]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez-Palacios]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Martín]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Muriel]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Antequera]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<source><![CDATA[Food Chem]]></source>
<year>2008</year>
<volume>110</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1025-9</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A Rapid Method of Total Lipid Extraction and Purification]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bligh]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Dyer]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
</person-group>
<source><![CDATA[Can J Biochem Physiol]]></source>
<year>1959</year>
<volume>37</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>911-7</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Lipid content of frozen fish: Comparison of different extraction methods and variability during freezing storage]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramalhosa]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Paíga]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Morais]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Rui Alves]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Delerue-Matos]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[MBPP]]></given-names>
</name>
</person-group>
<source><![CDATA[Food Chem]]></source>
<year>2012</year>
<volume>131</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>328-36</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[AOAC Official Method 969.33 Fatty Acids in Oils and Fats Preparation of Methyl Esters Boron Trifluoride Method First Action 1969]]></article-title>
<collab>Association of Official Analytical Chemists International AOAC</collab>
<source><![CDATA[AOAC OFFICIAL METHODS OF ANALYSIS]]></source>
<year>1995</year>
<page-range>17</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="">
<collab>Association of Official Analytical Chemists International AOAC. AOAC Official Method 996.06 Fat (Total, Saturated, and Unsaturated) in Food</collab>
<source><![CDATA[AOAC OFFICIAL METHODS OF ANALYSIS]]></source>
<year>2002</year>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="">
<collab>ICH</collab>
<source><![CDATA[Text on Validation of Analytical Procedures. Ich Harmon Tripart Guidel]]></source>
<year>1994</year>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortega]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Illera]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Juncadella]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lizondo]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[VALIDACIÓN DE MÉTODOS ANALÍTICOS. Hewlett Pa]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Barcelona, España ]]></publisher-loc>
<publisher-name><![CDATA[Asociación Española de Farmacéuticos de la Industria (AEFI)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effect of cooking method on the fatty acid content of reduced-fat and PUFA-enriched pork patties formulated with a konjac-based oil bulking system]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Salcedo Sandoval]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Cofrades]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz Capillas C]]></surname>
<given-names><![CDATA[JCF]]></given-names>
</name>
</person-group>
<source><![CDATA[Meat Sci]]></source>
<year>2014</year>
<volume>98</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>795-803</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[No TitleProduction of omega-3 polyunsaturated fatty acid concentrates: A review]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rubio-Rodríguez]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Beltrán]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Jaime]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[de Diego]]></surname>
<given-names><![CDATA[SM]]></given-names>
</name>
<name>
<surname><![CDATA[Sanz MT]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Innov Food Sci Emerg Technol]]></source>
<year>2010</year>
<volume>11</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-12</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Development and validation of a GC-FID method for quantitative analysis of oleic acid and related fatty acids]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
</person-group>
<source><![CDATA[J Pharm Anal]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Validation of a gas-liquid chromatographic method for analysing samples rich in long chain n-3 polyunsaturated fatty acids: Application to seafood]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Juárez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[a.]]></surname>
<given-names><![CDATA[Juárez]]></given-names>
</name>
<name>
<surname><![CDATA[Aldai]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Avilés C]]></surname>
<given-names><![CDATA[PO]]></given-names>
</name>
</person-group>
<source><![CDATA[J Food Compos Anal]]></source>
<year>2010</year>
<volume>23</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>665-70</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Comparison of four extraction/methylation analytical methods to measure fatty acid composition by gas chromatography in meat]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Juárez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Polvillo]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Contò]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[a.]]></surname>
<given-names><![CDATA[Ficco]]></given-names>
</name>
<name>
<surname><![CDATA[Ballico S]]></surname>
<given-names><![CDATA[FS]]></given-names>
</name>
</person-group>
<source><![CDATA[J Chromatogr A]]></source>
<year>2008</year>
<volume>1190</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>327-32</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Gas-liquid chromatographic method for analysing complex mixtures of fatty acids including conjugated linoleic acids (cis9trans11 and trans10cis12 isomers) and long-chain (n-3 or n-6) polyunsaturated fatty acids: Application to the intramuscular fat of bee]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aldai]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Osoro]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Barrón]]></surname>
<given-names><![CDATA[LJR]]></given-names>
</name>
<name>
<surname><![CDATA[Nájera]]></surname>
<given-names><![CDATA[A.I]]></given-names>
</name>
</person-group>
<source><![CDATA[J Chromatogr A]]></source>
<year>2006</year>
<volume>1110</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>133-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
