Spectrophotometric determination with eriochromcyanine

3 Spectrophotometric determination with eriochromcyanine R General remarks [Pg.331]

In acid solution aluminium ions together with eriochromcyanine R form a red-purple colour lake, the colour and intensity of which depend on the pH value of the solution. Optimum colour-lake formation occurs in the region [Pg.331]

The method is suitable for the determination of aluminium ions in concen- [Pg.331]

Fluoride ions interfere (negative interference) even in low concentrations. [Pg.331]

In order to eliminate fluoride ions the sample must be evaporated with [Pg.331]

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