This Malaysian Standard details procedures for the determination of the total tin content present in solutions and in treated wood containing bis(tri-n-butyltin)oxide. The methods have been found suitable for the determination of tin in the presence of the following: chloronaphthalenes; copper naphthenate: dieldrin (HEOD); ‘y — hexachiorocyclohexane ( y —HCH, lindane); pentachlorophenyl laurate; pentach(orophenol and other chlorophenols; 2—phenylphenol; zinc naphthenate; water-repellent waxes and resins.
It is assumed that all the tin determined by these methods has been derived from bis(tri-n-butyltin)oxide and hence the tin content is expressed in terms of bis(tri-n-butyltin)oxide.
With aged samples of treated wood, it is occasionally difficult to acid extract all the tin, particularly if iron or some other Cations are present. The method described in 2.4.4 has been shown to ensure that, in all cases, the proportion of tin not extracted is unlikely to affect the validity of the dete