Emission chamber

Air quality-Sampling and analysis of VOCs in ambient, indoor and workplace air (and small and large-scale materials emission chambers) by sorbent tube/ thermal desorption/capillary gas chromatography. Part 1 Pumped sampling. 

Standard practice for selection of sorbents, sampling and thermal desorption analysis procedures for VOCs in air (and material emissions chambers)... 

Potential Variables Associated with Testing Materials Using Emissions Chambers/Cells Edge Effects, Sample Orientation and Sample Storage Between Tests... 

Oppl, R. (2008) Reliability of VOC emission chamber testing-progress and remaining challenges. Gefahrstojfe Reinhaltung der Lufi, 68 (3), 83-6. 

Roache, N., Guo, Z. and Tichenor, B.A. (1996) Comparing the FLEC with traditional emissions chambers, in Characterising Sources of Indoor Air Pollution and Related Sink Effects (ed. B. Tichenor), ASTM STP 1287, Philadelphia, PA, USA, pp. 98-111. 

The existing test stand method and the standardized analytical process are powerful routine methods for delivering a reliable characterization of emissions in automobile interiors. The effects on the IAQ of changes in the interior furnishing can be followed precisely. When combined with emission-chamber measurements of single parts of the interior, components can be constantly improved and the quality of the materials for interior furnishings secured (Bauhof et ai, 1996 VDA, 2005). 

Based on emission chamber work, the approximate 8-h time-weighted average (TWA) for TVOC levels can exceed 2000 mg rn ° Xylene emissions from some paints approached the exposure levels at which neurological effects are often seen. 

With the exception of POC (VDI 4301-5, 2009), no special emission chamber measurements have been standardized for investigating the SVOC emissions (e.g.,... 

SEC Secondary emission chamber for pulse radiolysis size exclusion chromatography... 

Inasmuch as the irradiation dose can change from pulse to pulse, it is desirable and often necessary to monitor the dose delivered by each pulse. This can be done by means of various devices a toroidal coil placed around the electron beam [116], a secondary emission chamber placed just before the exit window of the accelerator [13], a charge collector placed in the proximity of the irradiation cell [117], or, electron beam energy permitting, behind the irradiation cell [118], With these devices, a parameter is obtained representing the relative dose of each pulse calibration against chemical dosimeters provides the knowledge of the absolute irradiation dose associated with each individual pulse. 

Latex paint Study of VOC emission (chamber) Sparks et al. (1999) [44]... 

Wall coverings SVOC emission (chamber) Uhdeetal. (2001) [71]... 

Dosimetry. The dose given by each pulse was monitored with a secondary emission chamber (abbr. SEC). The SEC was calibrated by... 

VOC emissions from indoor latex paints during and after application is determined by four different test methods a chamber method in which an emission chamber is combined with gas chromatography, two practical methods in which VOC emitted in a room is measured either by the determination of the total organic carbon or by infrared spectroscopy, and an in-can-individual-VOC method which determines the VOC of a liquid paint by the quantitative analysis of each volatile component. VOC emission data gathered by these methods are compared with calculations from a dynamic computer model describing the time-dependence of the VOC emission in the room atmosphere. This comparison indicates that the in-can-individual-VOC method with computer calculation allows variations in the size of the room, the application rate, VOC content of the paint and the rate of air change, without the necessity of additional experiments, and therefor, offers an approach with a reduction in costs. 10 refs. 

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