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

Abstract

Summary 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. Key words: Aluminium determinationautomatic analysiscatechol violet