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Lenth C.,Laser - Laboratorium Goettingen e.V. | Schumann A.,Schumann Analytics | Hasener J.,Fagus GreCon Greten GmbH and Co. KG | Steckel V.,Fagus GreCon Greten GmbH and Co. KG | And 2 more authors.
International Wood Products Journal | Year: 2014

A new and fast system for determining formaldehyde (HCHO) release of wood based panels (WBPs) for use in manufacturer's labs was developed. For sample preparation, solid phase microextraction (SPME) with a derivatisation step was used. The analytical system consists of a gas chromatographic column (GC) coupled to a high field asymmetric waveform ion mobility spectrometer (FAIMS). The emitted HCHO is determined in gaseous form, i.e. without trapping it in water. The system runs quasi-continuously with a cycle time of 20 min. This paper explains the basic functioning, and presents first results from a field trial. © 2014 IWSc, the Wood Technology Society of the Institute of Materials, Minerals and Mining. Source


Ohlmeyer M.,Thunen Institute of Wood Research | Kickhofen J.,University of Hamburg | Steckel V.,Fagus GreCon Greten GmbH and Co. KG | Hasener J.,Fagus GreCon Greten GmbH and Co. KG
International Wood Products Journal | Year: 2014

The gas analysis method according to EN 717 part 2 is a well-known technique to measure the formaldehyde emission of plywood and coated wood-based materials for quality control purposes. There is an increasing interest to apply thismethod also for uncoated wood-based panels compared to the perforator method (EN 120: 1992) owing tomany reasons. As there is still limited experience in testing particleboard with this method, it is the aim of this study to evaluate the effect of some parameters to ensure correct and precise testing using the gas analysis method. Furthermore, the study aimed to show how the m.c. of panels before testing affects the Gm, and to calculate an m.c. correction factor from these results for particleboard withmodern bonding systems at a low emission level. Gas analysis value and m.c. show a very good correlation. Based on this correlation an m.c. correction factor can be determined, which facilitates anm.c. correction of Gmdata. Thismay help to improve the quality of Gm data for quality control and data comparison (i.e. for round robin tests). Combining the sampling for hour 3 and 4 as well as 2, 3 and 4 has no significant effect on the level of formaldehyde emission tested. Also the accuracy of testing was not reduced. Consequently, the change in sampling procedure may lead to a reduction on the required number of water analyses needing to be performed in the laboratory, and therefore to a reduction in consumption of chemical consumables and expenditure of human labour. The reduction of overpressure during gas analysis did not have a major effect on the values as such, but increased the coefficient of variation. Also, an increase in air flowrate did not affect the Gmat lower emission levels. © 2014 IWSc, the Wood Technology Society of the Institute of Materials, Minerals and Mining. Source


Himmel S.,University of Gottingen | Mai C.,University of Gottingen | Schumann A.,Schumann Analytics | Hasener J.,Fagus GreCon Greten GmbH and Co. KG | And 2 more authors.
International Journal for Ion Mobility Spectrometry | Year: 2014

Several standardized methods exist to determine formaldehyde (HCHO) release from wood-based panels (WBPs). These methods were developed decades ago to be used in manufacturers laboratories to provide a mean of production control. They are robust and take several hours to yield results. Modern WBP panel production, however, is a continuous process. Therefore the established methods are too time-consuming for process control and process optimization with respect to HCHO release. Moreover, there is a strong trend of lowering the regulatory HCHO emission limits. Thus, there is a need for a comparatively fast and precise method which is suitable for the use on-site in a WBP manufacturers laboratory. In this work, an optimization of the solid phase micro extraction gas chromatography high field asymmetric waveform ion mobility spectrometry (SPME-GC-FAIMS) method is presented with respect to GC-FAIMS settings and the calibration procedure. It is also shown that, in addition to WBP block samples, also particles can be used for the measurement. The industrial applicability of SPME-GC-FAIMS system was demonstrated by testing the HCHO release of freshly produced WBPs on-site in the manufacturers laboratory. © 2014 Springer-Verlag Berlin Heidelberg. Source

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