Search

A large chamber test method for measuring indoor air emissions from office equipment was developed, evaluated, and revised based on the initial testing of four dry-process photocopiers. Because all chambers may not necessarily produce similar results (e.g., due to differences in sink effects, temperature and humidity control, air exchange, pollutant monitoring, and measurement biases), a preliminary four-laboratory evaluation of the revised test method was conducted. To minimize variability, the evaluation used a single dry-process photocopier that was shipped to each of the four laboratories along with supplies (i.e., toner and paper). The results of this preliminary four-laboratory evaluation demonstrate that the test method was used successfully in the different chambers to measure emissions from dry-process photocopiers. Differences in chamber design and construction appeared to have had minimal effect on the results for the volatile organic compounds (VOCs). Perhaps more important than the chamber itself is the sample analysis as identified by duplicate samples that were analyzed by a different laboratory. Percent relative standard deviation (%RSD) was used to provide a simplistic view of interlaboratory precision for this evaluation. Excluding problems with suspected analytical bias observed from one of the laboratories, the precision was excellent for the VOCs with RSDs of less than 10% in most cases. Less precision was observed among the laboratories for aldehydes/ketones (RSD of 23.2% for formaldehyde). The precision for ozone emission rates among three of the laboratories was excellent (RSD of 7.9%), but emission rates measured at the fourth laboratory were much higher.

This report describes the development of a portable spirometer capable of collecting primarily alveolar breath into 1.8-L canisters for subsequent gas chromatographic/mass spectrometric (GC/MS) analysis. Based on CO2 measurements, greater than 97% of the breath collected is alveolar in origin. Sample collection takes place in approximately two minutes. Clean air for inhalation is provided by two organic vapor respirator cartridges. Studies of the breakthrough volume of test compounds at both the 5- and 50-micrograms/m3 levels indicate that each cartridge filter can be used to sample over 300 L of air and that this volume is not altered by intermittent use and storage of the filter for up to five days. In experiments designed to mimic human breathing, recoveries of test compounds through the device at the 5-mu/m3 level ranged from 87 to 112%. Essentially no volatile organic compound (VOC) memory (i.e., adsorption carryover by the device) was measured at the 50-micrograms/m3 level. The data suggest that the device can be used successfully for organic compounds with volatilities greater than that of p-dichlorobenzene.

Por motivo do centenário do falecimento de Eça de Queirós. Submitted by Cleice Pereira Santos null (cleiceps@stj.jus.br) on 2014-03-31T15:16:24Z No. of bitstreams: 1 eca_politica_cunha.pdf: 70700 bytes, checksum: 7e63253f9c868c1cbf06bd6c4f9d93e7 (MD5) Approved for entry into archive by Josiane Cury Nasser Loureiro null(josiane@stj.jus.br) on 2014-04-01T16:33:15Z (GMT) No. of bitstreams: 1 eca_politica_cunha.pdf: 70700 bytes, checksum: 7e63253f9c868c1cbf06bd6c4f9d93e7 (MD5) Made available in DSpace on 2014-04-01T16:33:15Z (GMT). No. of bitstreams: 1 eca_politica_cunha.pdf: 70700 bytes, checksum: 7e63253f9c868c1cbf06bd6c4f9d93e7 (MD5) Previous issue date: 2001

Submitted by Diana Wolney Araujo Covello null (diacovel@stj.jus.br) on 2014-07-31T18:47:26Z No. of bitstreams: 1 intervencao_federal_canudos_cunha.pdf: 237908 bytes, checksum: 51953221ca9cc729330008e2a35a5658 (MD5) Rejected by Allan Rafael(allanr@stj.jus.br), reason: ... on 2014-07-31T19:16:06Z (GMT) Submitted by Diana Wolney Araujo Covello null (diacovel@stj.jus.br) on 2014-07-31T19:17:42Z No. of bitstreams: 1 intervencao_federal_canudos_cunha.pdf: 237908 bytes, checksum: 51953221ca9cc729330008e2a35a5658 (MD5) Approved for entry into archive by Josiane Cury Nasser Loureiro null(josiane@stj.jus.br) on 2014-08-01T14:49:27Z (GMT) No. of bitstreams: 1 intervencao_federal_canudos_cunha.pdf: 237908 bytes, checksum: 51953221ca9cc729330008e2a35a5658 (MD5) Made available in DSpace on 2014-08-01T14:49:27Z (GMT). No. of bitstreams: 1 intervencao_federal_canudos_cunha.pdf: 237908 bytes, checksum: 51953221ca9cc729330008e2a35a5658 (MD5) Previous issue date: 1998

Submitted by Diana Wolney Araujo Covello null (diacovel@stj.jus.br) on 2014-07-31T18:07:21Z No. of bitstreams: 1 direito_civil_constitucional_cunha.pdf: 266785 bytes, checksum: 5f6a5c74d017dd2ab369d6635b52182a (MD5) Approved for entry into archive by Cleice Pereira Santos null(cleiceps@stj.jus.br) on 2014-07-31T19:48:58Z (GMT) No. of bitstreams: 1 direito_civil_constitucional_cunha.pdf: 266785 bytes, checksum: 5f6a5c74d017dd2ab369d6635b52182a (MD5) Made available in DSpace on 2014-07-31T19:48:58Z (GMT). No. of bitstreams: 1 direito_civil_constitucional_cunha.pdf: 266785 bytes, checksum: 5f6a5c74d017dd2ab369d6635b52182a (MD5) Previous issue date: 1998

Methods for determining individual exposure to volatile organic compounds (VOC) during normal daily activities were field tested on university student volunteers in Texas and North Carolina. The equipment tested included a personal monitor employing Tenax GC® to collect organic vapors for later analysis by GC-MS, and a specially designed spirometer for collecting samples of expired human breath on duplicate Tenax cartridges. The personal monitor and spirometer proved feasible for collecting abundant quantitative data on most of the 15 target organics. Air exposures to many VOC varied widely, sometimes over three orders of magnitude, among students on the same campus who had been monitored over the same time period and day. A log-linear relationship between breathing-zone air exposures and concentrations in exhaled breath was suggested for three chemicals: tetrachloroethylene, 1,1,1-trichloroethane, and vinylidene chloride. Air was the main route of exposure for all target compounds except the two trihalomethanes (chloroform and bromodichloromethane), which were transmitted mainly through water. Estimated total daily intake through air and water of the target organics ranged from 0.3 to 12.6 mg, with 1,1,1-trichloroethane at the highest concentrations in both geographic areas.

Submitted by leitem@stj.jus.br (leitem@stj.jus.br) on 2019-09-09T18:59:18Z No. of bitstreams: 2 açao_revisional_locaçoes_cunha.pdf: 372672 bytes, checksum: 878e4fd9048cbe1e8153c3264a4f26b5 (MD5) license.txt: 1239 bytes, checksum: c9b4c351324448672315a00808efb725 (MD5) Approved for entry into archive by betanial@stj.jus.br (betanial@stj.jus.br) on 2019-10-16T14:23:43Z (GMT) No. of bitstreams: 2 açao_revisional_locaçoes_cunha.pdf: 372672 bytes, checksum: 878e4fd9048cbe1e8153c3264a4f26b5 (MD5) license.txt: 1239 bytes, checksum: c9b4c351324448672315a00808efb725 (MD5) Made available in DSpace on 2019-10-16T14:23:43Z (GMT). No. of bitstreams: 2 açao_revisional_locaçoes_cunha.pdf: 372672 bytes, checksum: 878e4fd9048cbe1e8153c3264a4f26b5 (MD5) license.txt: 1239 bytes, checksum: c9b4c351324448672315a00808efb725 (MD5) Previous issue date: 1982