An automatic colorimetric determination of aluminium in soil extracts using catechol violet

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Abstract
An automatic method for the colorimetric determination of Al in soil extracts using catechol violet was developed. The method is very reproducible and precise. The manifold arrangement covers a range of 0–1 μg ml−1. By using a dilution loop, solutions containing up to 10 μg ml−1 can be analysed. The method compares favourable with a manual catechol violet method and the alumin on method.

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