Content Handbook F

Outline of method

98.1 Colorimetric method

The water soluble copper is extracted and reduced to the Cu+ state. Bathocurproine is added and the absorbance of the coloured copper complex formed is measured at 465 nm.

MT 98.2 Atomic absorption spectrophotometric method

The sample is dispersed in de-ionized water. The mixture is centrifuged, filtered and the copper determined by means of an atomic absorption spectrophotometer.

Scope

98.1 Colorimetric method

The method is suitable for the determination of water-soluble copper in copper oxychloride and other water-insoluble copper fungicides.

MT 98.2 Atomic absorption spectrophotometric method

The method is suitable for the determination of water-soluble copper in copper oxychloride and other water-insoluble copper fungicides.