This article introduces the application of atomic absorption analysis (AA), including sampling and processing methods.
This document outlines the principles of Atomic Absorption (AA) for evaluating worker exposure to airborne particulates. It details the criteria for sampling procedures, distinguishing between area samples and personal samples, and lists OSHA Permissible Exposure Limits (PEL) for various substances analyzed by AA.
The guide provides specific instructions on sampling equipment, focusing on the use of a sampling train comprising an air pump, filter, and holder. It describes the configuration of personal sampling pumps and filter cassettes, including details on MCE membrane filters and particle separation devices for respirable dust.
| Filter diameter | 37 millimeters |
|---|---|
| Filter pore size | 0.8 or 0.45 micrometer |
| Respirable dust particle size | 0.5 to 1.0 microns |
The two general sample types are area samples and personal samples.
Personal samples should be collected in the breathing zone, generally defined as a sphere approximately two feet in diameter surrounding a worker's head.
A mixed cellulose ester (MCE) membrane filter is typically used.