Title: Analytical method for the determination of acid herbicides in sandstone and chalk aquifer materials (Draft RanD note) P439/9/A
Author: K. Forbes
Author: B. Hegarty
Author: S. Shurvell
Author: M. Norris
Document Type: Monograph
Abstract:
WRc is conducting a research programme for the National Rivers Authority on the occurrence of pesticides in major aquifers. Several analytical methods for pesticides in aquifer materials have been developed as part of the contract. This report describes a multi-residue analytical method for the determination of acid herbicides in sandstone and chalk aquifer materials. The method is based on the principle of extraction into a solution of calcium hydroxide, partition into dichloromethane after acidification and determination by Gas Chromatography-Mass Spectrometry (GC-MS) as the methyl esters or ethers. The method has estimated limits of detection for each herbicide of between 0.02 and 0.09 microg/kg, depending on recoveries, moisture content and interferences from the aquifer material. The format of the description of the method follows that adopted by the Standing Committee of Analysts in the series Methods for the Examination of Water and Associated Materials.
Publisher: National Rivers Authority
Publication Date: 1994
Publication Place: Bristol
Subject Keywords: Aquifers; Pesticides; Research projects; Acidification; Analytical methods
Extent: 17
Permalink: http://www.environmentdata.org/archive/ealit:2282
Total file downloads: 25
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