Use of 4-aminosalicylic acid in the flame atomic absorption spectrometric investigation and determination of magnesium, calcium and barium

Abstract

An investigation of the interferences of some cationic and organic compounds in the FAAS determination of Mg, Ca and Ba in a fuel-rich air–acetylene flame is described. The inhibition–release titration method was used to study such interferences. These effects can be completely eliminated by adding 6 mmol l^–1 4-aminosalicylic acid to both the sample and standard solution. An analytical procedure was elaborated for the determination of the analytes in different synthetic mixtures and samples.