Analysis of vitamins: A comparison between results obtained from chromatographic and voltammetric procedures.

Chromatographic and voltammetric procedures have been set up for the analysis of several vitamins, i.e. B-1, B-2, B-9, B-12, C. PP and B-6, contemporarily present in vitamins integrators and foodstuffs. The voltammetry was carried out on the same sample with dropping mercury electrode and rotating disk electrode and by checking pH with a glass electrode dipped in the same solution under analysis. A single run was sufficient to analyse all the above vitamins for both procedures. The results in terms of detection limits, response linearity and recovery percentages show advantages and disadvantages of the two methods, both for standards and real samples. The ease of making the samples suitable for analysis was also taken in particular account. The comparison between the results obtained in this paper explains that the described methods are not alternative, but complementary.