This Malaysian Standard details procedures for the determination of copper naphthenate. expressed as the amount of copper present, in preservatives and in treated timber containing this preservative. The methods have been found suitable for the determination of copper in the presence of tributyltin oxide, pentachlorophenol, o-phenylphenol, monochloronaphthalene, polychloronaphthalene, ? -HCH, dieldrin, zinc naphthenate, potassium salts and sodium salts. The wood sample may be in the form of sawdust, wood flour, or thin sections.
The procedure for the analysis of preservatives has been primarily designed for solutions complying with the requirements of MS 878. For samples of other compositions it may be necessary to make adjustments so that the solutions are within the analytical range and in the AAS determination, sample solution and standard solution have similar solution matrix. It is difficult to make recommendationsas to thequantity of sample to betaken inthecaseof treated wood becausethe predominantfactor is the quantity of preservative withinthewood ratherthanthe massof wood itself. It may thus be necessary to make some adjustments to the value quoted in the standard, either to the mass of the treated wood sample taken for analysis or to the level of dilution of the copper solution resulting from extraction.
Two methods are described, the first involving atomic absorption spectrophotometry and the second colorimetry.
MS 834-1984 history
1984MS 834-1984 Copper naphthenate preservative formulations and methods for quantitative analysis of treated wood