This document describes the application of Agilent 6890 series Micro-ECD in the detection of organochlorine pesticides in various matrices in the environment and validates its performance in linear working range, sensitivity, stability and resistance to contamination.
Generating environmental data for organochlorine pesticides can be time-consuming. This study evaluates the performance of the Agilent 6890 Series Gas Chromatograph equipped with a Micro-Electron Capture Detector (Micro-ECD) against EPA Contract Laboratory Program (CLP) criteria.
The analysis focuses on key improvements over classical detectors, including an increased linear working range exceeding four orders of magnitude for some components and enhanced sensitivity capable of detecting organochlorine pesticides at sub-ppb levels. The document details experimental conditions using water and soil samples spiked with surrogates, analyzed via EPA CLP method OLM03.
A 1-L volume of water is extracted with methylene chloride, while a 30-g aliquot of soil is extracted with a 1:1 acetone/methylene chloride mixture.
The initial calibration uses standards of 5, 20, and 80 pg/L for lindane.