3 research outputs found
Analysis and characterization of naphthenic acids by gas chromatography- electron impact mass spectrometry of tert.-butyldimethylsilyl derivatives
The renewed interest in naphthenic acid (NA) as a wood preservative has driven the need for analytical techniques to characterize commercial supplies of NA. The compositional heterogeneity of NA makes analytical characterization extremely difficult. Fluoride ion chemical ionization mass spectrometry (FI-MS) has proven to be an effective technique in NA characterization. However, FI-MS is very complicated and expensive to perform. In this paper, an alternative to the FI-MS technique is presented which offers similar results with a more widely available bench-top electron impact (EI) mass spectrometer. By derivatization of NA components to their tert.-butyldimethylsilyl analogs, the extent of molecular fragmentation is greatly decreased and strong base peaks representing the unfragmented NA constituents are obtained in the El spectra. Molecular mass and tentative structures can be deduced based on sites of unsaturation
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Reducing VOC Press Emission from OSB Manufacturing
Current regulations require industry to meet air emission standards with regard to particulates, volatile organic compounds (VOCs), hazardous air pollutants (HAPs) and other gases. One of many industries that will be affected by the new regulations is the wood composites industry. This industry generates VOCs, HAPs, and particulates mainly during the drying and pressing of wood. Current air treatment technologies for the industry are expensive to install and operate. As regulations become more stringent, treatment technologies will need to become more efficient and cost effective. The overall objective of this study is to evaluate the use of process conditions and chemical additives to reduce VOC/HAPs in air emitted from presses and dryers during the production of oriented strand board