Ultraviolet spectrophotometry and fourier transform infrared spectroscopy characterization of copper naphthenate

摘要

Ultraviolet-Visible (UV-VIS) spectrophotometry and Fourier Transform Infrared (FTIR) spectroscopy were used to characterize copper naphthenate (Cu-N) complex in treating solution and in Cu-N treated wood. At wavelength 680 ± 2 nm, the absorption wasproportional to the amount of Cu-N present in solution. FTIR was used to confirm the presence of the carboxylate group in the Cu-N complex and the carboxylic acid in the non-complexed naphthenic acid (NA). Toluene was used to extract Cu-N from treated wood for UV-vis quantitative analysis. This method can be applicable to the determination of Cu-N in solution and in treated wood with detection limits ranging from 4 to 80 ppm.