Improved quantitative determination of benzalkonium chloride in treated wood by liquid chromatography
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Teruhisa Miyauchi
Abstract
Ammoniacal copper quaternary (ACQ) wood preservatives contain benzalkonium chloride (BAC) as the active ingredient. BACs in commercial ACQ products comprise mainly benzyldimethyldodecyl ammonium chloride (C12 homologue) and benzyldimethyltetradecyl ammonium chloride (C14 homologue). Previously, we developed solid-phase extraction (SPE) on Oasis MCX as a strong cation exchanger, followed by liquid chromatography with UV detection (LC-UV) for the quantitative determination of C12 and C14 homologues in treated wood. In this study, the previous method was modified. Samples were cleaned up before analysis, and a weak cation exchanger, Oasis WCX, was employed. C12 and C14 homologues were added to 500 mg of powdered wood samples of Japanese cedar (Cryptomeria japonica), Japanese larch (Larix leptolepis), Sakhalin fir (Abies sachalinensis), and Yezo spruce (Picea jezoensis) at levels of 10, 1, and 0.1 mg g-1 wood. Treated wood samples were then extracted with HCl/EtOH, and the extracts were filtered and subjected to SPE with Oasis MCX and Oasis WCX, followed by LC-UV analysis. Recovery rates ranging from 90% to 111% were achieved for SPE using both cation exchangers for active ingredient concentrations of 0.1–10 mg g-1.
©2007 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- To all readers, authors and subscribers
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 1. Energy savings and improved pulps
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 2. Release of hemicellulosic carbohydrates
- Size exclusion chromatographic and UV-VIS absorption analyses of unbleached and bleached softwood kraft pulps using LiCl/1,3-dimethyl-2-imidazolidinone as a solvent
- A new method for the titration of free phenolic groups in pulps
- Adsorption of water-soluble organic dyes on ferrofluid-modified sawdust
- Mechanical properties and creep behavior of lyocell fibers by nanoindentation and nano-tensile testing
- Deformation behavior of wet lignocellulosic fibers
- Changes in physical, mechanical and chemical properties of wood during sterilisation by gamma radiation
- Penetration of poly(ethylene glycol) into wood cell walls of red pine
- Transverse mechanical behaviour and moisture absorption of waterlogged archaeological wood from the Vasa ship
- Determination of residual stress in bonded wood components
- Decohesion of glue bonds in wood connections
- Delamination assessment after drilling medium-density fibreboard (MDF) by digital image analysis
- Effects of thinning and fertilisation on tracheid dimensions and lignin content of Norway spruce
- Detection of β-1-4-galactan in compression wood of Sitka spruce [Picea sitchensis (Bong.) Carrière] by immunofluorescence
- Laboratory and outdoor water repellency and dimensional stability of southern pine sapwood treated with a waterborne water repellent made from resin acids
- Evidence of fungicidal and termicidal properties of Prunus africana heartwood extractives
- The effectiveness of silica treatments against wood-boring invertebrates
- Sap-staining fungi from logs and boards of two commercially important pines in Korea
- Improved quantitative determination of benzalkonium chloride in treated wood by liquid chromatography
- Obituary Anders Björkman (1920–2006)
