Determination of the residual carbon content by inductively coupled plasma atomic emission spectrometry after decomposition of biological samples

Abstract

The residual carbon content of milk samples was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) to evaluate the effectiveness of dissolution procedures. An ICP-AES method was established by using the C I 193.091 nm emission and Myers–Tracy signal compensation with Sc II 424.683 nm reference. Optimum working conditions were found with a detection limit of 2.4 mg dm–3 and RSD 2%. A spectrophotometric CrVI reduction method was compared for the determination of the total carbon.