<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>J.T. Stewart</dc:contributor>
  <dc:contributor>Mark W. Sandstrom</dc:contributor>
  <dc:creator>C.E. Lindley</dc:creator>
  <dc:date>1996</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;A sensitive and reliable gas chromatographic/mass spectrometric (GC/MS) method for determining acetochlor in environmental water samples was developed. The method involves automated extraction of the herbicide from a filtered 1 L water sample through a C&lt;/span&gt;&lt;sub&gt;18&lt;/sub&gt;&lt;span&gt;&amp;nbsp;solid-phase extraction column, elution from the column with hexane-isopropyl alcohol (3 + 1), and concentration of the extract with nitrogen gas. The herbicide is quantitated by capillary/column GC/MS with selected-ion monitoring of 3 characteristic ions. The single-operator method detection limit for reagent water samples is 0.0015 μg/L Mean recoveries ranged from about 92 to 115% for 3 water matrixes fortified at 0.05 and 0.5 μg\L. Average single-operator precision, over the course of 1 week, was better than 5%.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1093/jaoac/79.4.962</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Oxford Academic</dc:publisher>
  <dc:title>Determination of low concentrations of acetochlor in water by automated solid-phase extraction and gas chromatography with mass-selective detection</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>