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Titolo:
Design and evaluation of a breath-analysis system for biological monitoring of volatile compounds
Autore:
Thrall, KD; Callahan, PJ; Weitz, KK; Edwards, JA; Brinkman, MC; Kenny, DV;
Indirizzi:
Battelle Mem Inst, Pacific NW Natl Labs, Mol Biosci Dept, Richland, WA 99352 USA Battelle Mem Inst Richland WA USA 99352 osci Dept, Richland, WA 99352 USA Battelle Mem Inst, Atmospher Sci & Appl Technol Dept, Columbus, OH 43201 USA Battelle Mem Inst Columbus OH USA 43201 hnol Dept, Columbus, OH 43201 USA
Titolo Testata:
AIHAJ
fascicolo: 1, volume: 62, anno: 2001,
pagine: 28 - 35
SICI:
1529-8663(200101/02)62:1<28:DAEOAB>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXPOSURE INDEXES; PHARMACOKINETIC MODELS; EXHALED BREATH; BENZENE; TOLUENE; HUMANS; RAT;
Keywords:
breath analysis; exposure assessment; PBPK modeling; field studies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Thrall, KD Battelle Mem Inst, Pacific NW Natl Labs, Mol Biosci Dept, POB 999 Mail Stop P7-59, Richland, WA 99352 USA Battelle Mem Inst POB 999 Mail Stop P7-59 Richland WA USA 99352
Citazione:
K.D. Thrall et al., "Design and evaluation of a breath-analysis system for biological monitoring of volatile compounds", AIHAJ, 62(1), 2001, pp. 28-35

Abstract

To ensure the health and safety of workers, integrated industrial hygiene methodologies often include biological monitoring of the workers to help understand their exposure to chemicals. To this end, a field-portable breath-analysis system was developed and tested to measure selected solvents in exhaled air. The exhaled breath data were evaluated using a physiologically based pharmacokinetic (PBPK) model to relate exposure to tissue dose. The system was designed to monitor workers every time they entered or left a workenvironment-a vast improvement over current 8-hour integrated monitoring strategies. The system combines (1) chemical dosimeters to measure airborne contaminant levels (analyzed in the field/ workplace); (2) real-time breathanalysis to quantitate exposure; and 3) PBPK models to estimate internal target tissue dose. To evaluate the system, field tests were conducted at two locations: (1) at an incinerator in Tennessee monitoring benzene and toluene exposures; and (2) a waste repackaging facility in Washington State where hexane, trimethylbenzene, and methylene chloride was monitored. Exhaled breath was sampled and analyzed before and after each specific job task, which ranged from 15 min to 8 hours in duration. In both field studies several volunteers had posttask breath levels higher than pretask levels. The greatest increase corresponded to 573 ppb for methylene chloride and 60 ppb for toluene. Compared with breath analysis, the chemical dosimeters underpredicted the dosimetry, particularly for longer sampling intervals when the volume of air sampled may have diluted exposures. The results of the field studies illustrate the utility of monitoring workers for exposures throughoutthe day, particularly when job-specific tasks may indicate a potential forexposure.

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Documento generato il 07/07/20 alle ore 18:40:51