This method is intended for the determination
of oxine-copper (AWPA P8) in treating solutions and
treated wood samples, when a method that is specific
for oxine (8-hydroxyquinoline) is required. This
method will differentiate oxine-copper (Cu8HQ: also
called copper-8-hydroxyquinoline or copper-8-
quinolinolate) from other copper-containing biocides.
An alternative method for the quantitation of this bio-cide
is the determination of total copper by atomic ab-sorption
spectroscopy.
This potentiometric titrafion monitors the bromine
substitution reaction in the 5, 7 positions on the
oxine moiety of copper-8-hydroxyquinoline in aqueous
acid solution, with potassium bromate-potassium bromide
titrant. Although there may be other brominatable
species in the wood extracts that contribute to a high
blank, they are effectively subtracted out by running standard additions standard curve.
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| Number of Pages : | 2 |
| Published : | 07/01/2000 |
