Standard Guide for Personal Samplers of Health-Related Aerosol Fractions

Importancia y uso:

4.1 This guide is intended to provide the conventions adopted by the International Standards Organization (ISO 7708), the Comité Européen de Normalisation (CEN EN 481), and the American Conference of Governmental Industrial Hygienists (ACGIH) (1). The definition of respirable aerosol is the basis for recommended exposure levels (REL) of respirable coal mine dust as promulgated by NIOSH (Criteria for a Recommended Standard, Occupational Exposure to Respirable Coal Mine Dust (15)). The respirable aerosol definition also forms the basis of the NIOSH sampling method for respirable particulates not otherwise regulated (NIOSH Manual of Analytical Methods (16)).

4.2 The convention can be used for those who are preparing to evaluate a workplace environment by collecting samples of aerosolized particles, or who wish to obtain an understanding of what information can be obtained by such sampling. The convention to be used is not always straightforward, but generally depends on what part of the respiratory system is affected by the aerosol particles. The conventions are often applied for approximating mass fractions, but they may also be used in the evaluation of total surface area or the number of particles in the collected material.

4.3 The conventions constitute a part of the performance characteristics required of aerosol samplers for collecting aerosol according to the relevant health effects. This guide therefore does not specify particular samplers for measuring the aerosol fractions defined here. Detailed guidelines for evaluating any given sampler relative to the conventions are available (CEN EN 13205, six parts). Several advantages over instrument specification can be attributed to the adoption of these performance-associated conventions:

4.3.1 The conventions have a recognized relationship to health effects.

4.3.2 Performance criteria permit instrument designers to seek practical sampler improvements.

4.3.3 Performance criteria promote continued experimental testing of the samplers in use with the result that the significant variables (such as wind speed, particle charge, and so forth) affecting sampler operation become understood.

Subcomité:

D22.04

Referida por:

D4532-22, D6494-22, D8344-24, D6061-01R18E01, D6552-06R21, D8358-21, D7035-21

Volúmen:

11.07

Número ICS:

13.040.20 (Ambient atmospheres)

Palabras clave:

aerosol; conventions; deposition; fractions; inhalable; particle; particulates; penetration; respirable; sampling efficiency; size-selective; thoracic;