Organic preservative based systems are being developed as replacements for the metal based systems. Typically the chemical actives of organic preservative systems are analyzed using HPLC or GC. However, these analytical techniques require complex sample processing and involve relatively long analysis times. In addition the equipment requires maintenance and a skilled operator. One organic preservative that is currently being developed for a range of uses in wood preservation, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT), contains both sulfur and chlorine functionality, providing the potential for the use of XRF for its analysis in both treating solutions and in wood. In this study the applicability of XRF to determine the concentration of DCOIT using the chlorine and sulfur x-ray emissions was determined.

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