Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Indoor air 1 (1991), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: Field measurements of 21 volatile organic compounds (VOC) using diffusive samplers, formaldehyde, temperature, and humidity were performed from the time of building completion throughout the following one-year period in two new semi-detached twin apartments. One of these was occupied after six weeks. Headspace analyses from all building materials and products showed 120 different VOC. Formaldehyde concentrations were strongly seasonally dependent in the vacant apartment and increased to above 400 μg/m3 during the warm season. The formaldehyde concentration generally decreased in the occupied apartment but increased again during the fall season. VOC originating from building materials generally showed a decrease in emission, but strong seasonal variations were observed. It was shown that human activity introduces several VOC to the indoor environment. Storage of motorcycle parts in the crawl space of the occupied apartment resulted in migration and an infiltration of benzene and toluene into the apartment above and probably to a delayed peak concentration in the twin vacant apartment. Similarly, large VOC increases in one apartment were reflected by a later increase of the same VOC in the twin apartment. Hexanal increased during the warm season. TVOC, as the sum of 21 VOC, was generally approximately 50 % higher in the occupied apartment during the cold season. The results indicate the difficulties in interpreting long-term measurements. The “flushing period” recommended for this type of building has been estimated to be about 130 days.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: Abstract The amount of volatile organic compounds (VOCs) in indoor air, usually called TVOC (total volatile organic compounds), has been measured using different definitions and techniques which yield different results. This report recommends a definition of TVOC referring to a specified range of VOCs and it proposes a method for the measurement of this TVOC entity. Within the specified range, the measured concentrations of identified VOCs (including 64 target compounds) are summed up, concentrations of non-identified compounds in toluene equivalents are added and, together with the identified VOCs, they give the TVOC value.The report reviews the TVOC concept with respect to its usefulness for exposure assessment and control and for the prediction of health or comfort effects. Although the report concludes that at present it is not possible to use TVOC as an effect predictor, it affirms the usefulness of TVOC for characterizing indoor pollution and for improving source control as required from the points of view of health, comfort, energy efficiency and sustainability.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Indoor air 13 (2003), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: Abstract The most important indoor air pollutants have already been addressed with individual national guidelines or recommendations. However, an international set of guidelines or recommendations for indoor air quality (IAQ) is needed for these pollutants based on general and uniform rules for setting such standards. A major research need exist on the less adverse pollutants before recommendations or guidelines can be established. In the interim period a precaution principle should lead to an ALARA principle for these secondary causalities. It should be noted that volatile organic compound (VOC) as an IAQ problem still is in the end of a phase of ad hoc solutions, in the middle of a research phase and only in the beginning of a regulatory phase. Any final official regulation in this area will have to be tentative and the final regulation must await further research. Total volatile organic compound (TVOC) is an indicator for the presence of VOC indoors. The TVOC indicator can be used in relation to exposure characterization and source identification but for VOCs only, not as an indictor of other pollutants and their health effects. In risk assessment the TVOC indicator can only be used as a screening tool and only for sensory irritation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Indoor air 5 (1995), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: According to the Californian Safe Drinking Water and Toxic Enforcement Act, Proposition 65 (State of California, 1986) the manufacturers and retailers of products (such as furniture and fittings) which emit formaldehyde are obliged to either mark their products with a warning label or provide evidence that their products do not pose a significant cancer risk to the consumer. The significant risk is defined as 1 case of cancer in a population of 100,000 persons within a period of exposure of 70 years (State of California, 1992).In this study, a large-scale climate chamber test of a full set of furniture and fitments was made. The formaldehyde concentration in a test chamber peaked at about 112 μg/m3 within a day after the furniture had been installed. After 8 weeks the concentration leveled out at about 50 μg/m3.Various models were used to predict occupant exposures in homes containing the same furniture and fitments; multi-compartment models identified a short-term compartment with a half-life of between 5.2 and 6.0 h and a relative source strength of between 75% and 30% of the total source strength; a medium-term compartment with a half-life of between 14 and 81 days; and a long-term compartment for which the best estimate of a half-life was 384 days.The accumulated dose of formaldehyde absorbed by an occupant during 70 years of exposure in the hypothetical home was estimated by extrapolation using the same models. The dose was found to be in the range of 0.13 g to 0.16 g.The concentration in the test chamber showing a maximum value of 112 μg/m3 formaldehyde may cause discomfort among hypersensitive persons during the first couple of days. The risk estimates based on the estimated long-term dose indicate that the cancer risks associated with the exposure caused by furniture are in the range of 6.9 to 8.9 × 10−8, based on monkey data, and 5.8 to 7.4 × 10−7, based on rat data.In conclusion, a successful draft protocol was established for tests in relation to Proposition 65 and, with the limitations of this exploratory study, the actual furniture equipment is considered to cause no significant cancer risk to the consumer according to the Proposition.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Indoor air 8 (1998), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: Abstract Consensus on simplified procedures for evaluating health consequences of occupational and outdoor exposures has existed for many years and there is no reason why a similar consensus cannot be made for normal indoor environments. A discussion of such a procedure and its limitations is the purpose of this paper. The exposure measurements should be presented to the toxicologist in the form of a list of identified compounds, concentrations of each compound reported as lifetime-integrated absorbed dose, average concentration (e.g. 24 h), peak exposures (e.g. 10–30 s), and peak exposure frequency (e.g. 90% fractile). In that perspective some of the main recommendations of this paper are that a list of compounds expected to be relevant to indoor air and the required sensitivity of the analytical procedures for these compounds must be established. These chemicals must be identified and quantified in an analysis of indoor air. Generally the investigators should pay the same interest in accurate measurements of exposure and of effects, and sampling should be made within one sampling period from measurements of health effects. The compounds of relevance to indoor air should be grouped according to the relevant toxicological principles for their evaluation. Those for which acceptable data and evaluation principles exist or can be estimated are placed on a positive list. In addition, a sub-list should be established of the remaining relevant compounds which for one or more reasons cannot be dealt with in the proposed evaluation scheme, and a consensus must be reached on the maximal acceptable fraction of compounds that cannot be toxicologically evaluated (toxicologically unknown). Finally, guidelines for evaluation of the exposures must be established including guideline values for the relevant compounds as well as procedures for sensory evaluations.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Indoor air 8 (1998), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: Abstract The Helsinki Declaration and similar national regulations require that the ethical aspects of all intended experimental exposures of humans should be evaluated and found acceptable, using the best available toxicological principles and data. In the low-level exposure ranges of indoor air, very little is known about the principles for such evaluations and few health data exist. This paper discusses principles for such evaluations in relation to experimental exposures of IAQ panels. The acceptability of chemical exposures of human subjects in IAQ research should be based on the following principles, a) Only reversible non-adverse health effects can be accepted. The risk of adverse effects associated with exposure must be documented to be acceptably low. b) Exposures to well-known chemicals or emissions from commercially available sources can be accepted if these sources have a history of many years' problem-free use on the free market and if their use during the experimental exposures corresponds to normally encountered exposures. Studies including exceptional exposures or sensitive subjects should be registered and evaluated by the local ethics committees. c) Exposures to emissions from new types of source can be accepted if the exposures are chemically identified and are below official indoor, outdoor or occupational guidelines for exposures. Procedures for the evaluation of exposures to compounds lacking toxicological data are discussed. These exposures should be registered and evaluated by local ethics committees. d) The selection of subjects must include special pre-tests and defined exclusion criteria to exclude risk groups.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Notes: Abstract The presence of Volatile Organic Compounds (VOC) in indoor air has in past decades often been associated with adverse health effects such as sensory irritation, odour and the more complex set of symptoms called the Sick Building Syndrome (SBS). More recently, a possible link between the increase in the prevalence of allergies throughout the industrialized areas of the world and exposure to elevated concentrations of VOCs has been suggested. In many cases, the total VOC (TVOC) is used as a measure of the concentration of air pollution and, by extension, as a measure of the health risk in non-industrial buildings. However, the TVOC concept has been questioned for a number of reasons, including the facts that it is an ambiguous concept, that individual VOCs making up the whole can be expected to give rise to different effects in people and that researchers have been using different definitions and interpretations of TVOC. This means that simple addition of the quantities of individual VOCs may not be relevant from a health point of view.Twelve researchers from the Nordic countries have reviewed the literature on VOC/TVOC and health. A search of the literature resulted in the identification of about 1100 articles, of which 120 were selected for further examination. A final review of the articles reduced their number to 67 that contained data on both exposure and health effects.The group concluded that indoor air pollution including VOC is most likely a cause of health effects and comfort problems in indoor environments in non-industrial buildings. However, the scientific literature is inconclusive with respect to TVOC as a risk index for health and comfort effects in buildings. Consequently, there is at present an inadequate scientific basis on which to establish limit values/guidelines for TVOC, both for air concentrations, and for emissions from building materials. The group concluded that continued research is required to establish a risk index for health and comfort effects for VOC in non-industrial buildings.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Indoor air 15 (2005), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Indoor air 14 (2004), S. 0 
    ISSN: 1600-0668
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...