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NHEXAS PHASE I ARIZONA STUDY--STANDARD OPERATING PROCEDURE FOR ANALYSIS OF SOIL OR HOUSE DUST SAMPLES USING CHLORPYRIFOS ELISA SAMPLES (BCO-L-1.0)
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Citation:
Arizona Study Consortium. NHEXAS PHASE I ARIZONA STUDY--STANDARD OPERATING PROCEDURE FOR ANALYSIS OF SOIL OR HOUSE DUST SAMPLES USING CHLORPYRIFOS ELISA SAMPLES (BCO-L-1.0). U.S. Environmental Protection Agency, Washington, D.C., 1995.
Description:
This abstract is included for completeness of documentation, but this SOP was not used in the study.
The purpose of this SOP is to describe the procedures for analyzing both Stage II and Stage III soil and vacuum-cleaner collected house dust samples, and Stage III air samples using a commercially-available enzyme-linked immunosorbent assay (ELISA) test kit for quantification of the pesticide chlorpyrifos. For Stage II soil and dust samples, this SOP provides the methods for extraction, analysis and calculation of dust concentration. For Stage III soil, dust, and air samples, gas chromatography mass spectrometry (GC/MS) analysis is the primary analysis method and ELISA analysis is used for only a subset of the total samples for comparison purposes; this SOP provides the ELISA analysis method and necessary calculations for these samples used for comparison of analysis methods. The extraction of Stage III soil, dust and air samples are covered in SOPs BCO-L-11 and L-14. At appropriate places in sample work-up, these SOP's direct the analyst to remove an aliquot of the extract and use that aliquot to begin ELISA analysis at a particular point in this SOP.
The National Human Exposure Assessment Survey (NHEXAS) is a federal interagency research effort coordinated by the Environmental Protection Agency (EPA), Office of Research and Development (ORD). Phase I consists of demonstration/scoping studies using probability-based sampling designs. The studies collected household environmental and personal samples for chemical analysis, and questionnaires were administered. The NHEXAS Phase I Questionnaires were organized into six modules for simplicity in administration (to minimize respondent burden and maximize participation rates at each step) and for collecting information that can be temporally related to the exposure, concentration, and/or biological measurements collected in NHEXAS: Descriptive, Baseline, Technician, Follow-up, Time and activity diary, and Dietary diary (and follow-up). The NHEXAS Arizona study sampled residences determined by a population-based probability research design for the total population of Arizona and measured metals, pesticides, and volatile organic compounds (VOCs). Analytical results were obtained under strict QA/QC requirements during collection, processing, and final deposition into databases. In addition, strict standard operating procedures were followed throughout the NHEXAS Arizona study. The study was conducted by a consortium composed of the University of Arizona, Battelle Columbus, and the Illinois Institute of Technology. Data collection occurred between June 1995 and February 1998 for the participating households.
NOTE: The U.S. Environmental Protection Agency (EPA), through its Office of Research and Development (ORD), partially funded and collaborated in the research described here. This SOP is part of the Quality Systems Implementation Plan (QSIP) that was reviewed by the EPA and approved for use in the Arizona study and is provided for documentation purposes. It does not reflect EPA methods and should not be construed as such. The methods were generated by the consortium to be used for the NHEXAS pilot study. Mention of trade names or commercial products does not constitute endorsement or recommendation by EPA for use.