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  <front>
    <journal-meta>
      <journal-title-group>
        <journal-title>American Journal of PharmTech Research</journal-title>
        <abbrev-journal-title abbrev-type="publisher">AJPTR</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="epub">2249-3387</issn>
      <publisher>
        <publisher-name>undefined</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="publisher-id">AJPTR51025</article-id>
      <title-group>
        <article-title>A Stability Indicating ultra Performance Liquid Chromatography Method for Simultaneous Estimation of Verapamil Hydrochloride and Trandolapril in Combined Dosage Formulations</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Pusapati</surname>
            <given-names>Vani</given-names>
          </name>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Seela</surname>
            <given-names>K. Kalyana</given-names>
          </name>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
      </contrib-group>
      <aff id="aff1">Jawaharlal Nehru Technological University, Kukatpally, Hyderabad, India.</aff>
      <aff id="aff2">United States Pharmacopieal convention, Shameerpet, Hyderabad-500078.</aff>
      <pub-date pub-type="epub" iso-8601-date="2015-02-01">
        <month>02</month>
        <day>01</day>
        <year>2015</year>
      </pub-date>
      <volume>5</volume>
      <issue>1</issue>
      <abstract>
        <p>An accurate, rapid, specific and stability indicating ultra performance liquid chromatographic method was developed and validated for the simultaneous estimation of Verapamil and Trandolapril in a combined pharmaceutical dosage form. The chromatographic separation was attained on Phenonemex Luna C18 (4.0 x 100 mm, 2.6mm) column by isocratic mode with the mobile phase components as 0.03M monobasic potassium phosphate buffer (pH6.5) and acetonitrile (70: 30v/v) at a flow rate of 1.0 mL/min and quantified at 210 nm. The average retention times for Trandolapril and Verapamil were 0.60 and 1.14 min, respectively. The UPLC method proposesoutstanding separation of two drugs with a good resolution of greater than 2.0 and tailing factor less than 2.0 with a run time of 3 minutes. The method shows linearity over the concentration range of 9-45 µg/mL for Verapamil and 0.1-0.5 µg/mL for Trandolapril with a correlation ≥ 0.999. The method is accurate with recoveries in the range of 98.0 -101.0% and precise with %RSD value lesser than2.0% for both the drugs. This method is very fast, cost saving, accurate and specific for the assay of commercially available tablets.</p>
      </abstract>
      <kwd-group kwd-group-type="author">
        <kwd>Verapamil Hydrochloride (VER) and Trandolapril (TRD)</kwd>
        <kwd>Validation</kwd>
        <kwd>Tablets</kwd>
        <kwd>High performance liquid chromatography (HPLC) and Ultra performance liquid chromatography (UPLC)</kwd>
      </kwd-group>
    </article-meta>
  </front>
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