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Automated breathing and metabolic simulator (ABMS) CO2 test for powered and non-powered air-purifying respirators, airline respirators, and gas mask.

Authors
Sinkule-E; Turner-N; Hota-S
Source
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas. Fairfax, VA: American Industrial Hygiene Association, 2003 May; :54
NIOSHTIC No.
20022781
Abstract
There is currently no NIOSH certification test for CO2 concentrations in air-purifying respirators. The Automated Breathing and Metabolic Simulator (ABMS), which simulates human metabolism, minute ventilation, and breathing waveforms, was used to characterize average inhaled CO2 in a variety of NIOSH-approved air-purifying respirators. An ABMS CO2 test protocol was developed to test 11 powered air-purifying respirators (PAPRs), 20 airline respirators (SARs), six gas masks, 27 P-I00 air-purifying respirators (APRs), and 26 filtering-facepiece N95 respirators (N95s). The ABMS CO2 protocol consisted of the following levels of 2 consumption, CO2 production, and minute ventilation performed consecutively for a minimum of five minutes each: 0.5, 0.4, and 10 L/min STPD; 1.0, 0.8, and 25 L/min STPD; 1.5, 1.3, and 38 L/min STPD; 2.0, 1.9, and 62 L/min STPD; 2.5, 2.5, and 70 L/min STPD; and 3.0, 3.1, and 80 L/min STPD, respectively. The mean across all PAPR models for average inhaled CO2 and 2 ranged from 0.2% and 20.7%, respectively, for the lowest metabolic rate to 0.9% and 20.0%, respectively, for the greatest metabolic rate. The mean across all SARs for average inhaled CO2 and 2 ranged from 0.5% and 20.3%, respectively, for the lowest metabolic rate to 0.4% and 20.5%, respectively, for the greatest metabolic rate. The mean across all gas masks and APRs for average inhaled CO2 and 2 ranged from 2.6% and 17.5%, respectively, for the lowest metabolic rate to 0.7% and 20.4%, respectively, for the greatest metabolic rate. The mean across all N95s for average inhaled CO2 and 2 ranged from 3.5% and 16.8%, respectively, for the lowest metabolic rate to 2.7% and 18.6%, respectively, for the greatest metabolic rate. These data demonstrate the wide range of average inhaled CO2 concentrations across respirator types and the utility of the ABMS in conducting CO2 testing.
Keywords
Breathing; Breathing-atmospheres; Air-purifiers; Air-purifying-respirators; Respirators; Metabolism; Respiratory-protective-equipment
CAS No.
124-38-9; 7782-44-7
Publication Date
20030510
Document Type
Abstract
Fiscal Year
2003
NTIS Accession No.
NTIS Price
NIOSH Division
SRL; NPPTL
Source Name
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas
State
PA; WA; TX
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