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Citation:

Arizona Border Study Consortium. U.S.-MEXICO BORDER PROGRAM ARIZONA BORDER STUDY--STANDARD OPERATING PROCEDURE FOR EXTRACTION OF METALS FROM SOIL, DUST, AIR FILTER, AND SURFACE AND DERMAL WIPE SAMPLES FOR AA (GRAPHITE FURNACE OR FLAME) OR ICP-AES ANALYSIS (BCO-L-3.1). U.S. Environmental Protection Agency, Washington, D.C.

Description:

The purpose of this SOP is to describe the acid digestion of soil, house dust, air filter, and surface or dermal wipe samples for analysis using inductively coupled plasma atomic emissions spectrometry (ICP-AES) and/or graphite furnace atomic absorption spectrometry (GFAAS) or flame atomic absorption spectrometry (FAAS). This procedure was followed to ensure consistent data retrieval during the Arizona NHEXAS project and the Border study. Keywords: soil; dust; air filter; dermal wipe; surface wipe; metals; acid digestion.

The U.S.-Mexico Border Program is sponsored by the Environmental Health Workgroup of the Border 2012 Program. The Environmental Health Workgroup's mission is "to identify and address, in a binational framework, environmental factors that pose the highest risk to human health so that exposure to such factors may be reduced." To accomplish this mission, studies are performed to help understand the interrelationships between environmental conditions and human health. The Arizona Border Study, sponsored by the Environmental Health Workgroup, is an extension of the Arizona National Human Exposure Assessment Survey (NHEXAS) Phase I Study. The Arizona Border Study collected household environmental and personal samples for chemical analysis, and questionnaires were administered. The NHEXAS Phase I Questionnaires were used with some adjustments and were organized into seven modules (Descriptive, Baseline, Technician, Follow-up, Time and activity diary, Dietary diary, and Supplement) for simplicity in administration. The questionnaires are designed for collecting information that can be temporally related to the exposure, concentration, and/or biological measurements. The Arizona Border study sampled residences determined by a population-based probability research design for populations in the Arizona counties bordering Mexico, and measured metals, pesticides, polynuclear aromatic hydrocarbons (PAHs), 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 Arizona Border 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 September 1997 and July 1998 for the participating households.

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