Apparatus for the automatic preparation of soil extracts for mineral-nitrogen determination

Abstract

An apparatus is described that automatically prepares samples and feeds an AutoAnalyzer system. It consists of a reagent adder, which adds the correct volume of extractant for an approximately weighed amount of soil, and a sample preparation unit, which mixes, filters, dilutes and loads samples on to an AutoAnalyzer sampler. The results obtained using the apparatus were in good agreement with those obtained by manual sample preparation.