Abstract
Analytical capillary isotachophoresis (ITP) was employed to control an enzyme-catalyzed peptide synthesis and the subsequent purification, as well as to evaluate the amino acid composition after acid and enzymatic hydrolysis. Compared with alternative chromatographic techniques. ITP offers certain advantages such as simultaneous detection of the synthetic peptide, amino acids, amino acid derivatives and contaminating inorganic ions in amounts of less than 200 ng. In addition, ITP provides quantitative information about the composition of the untreated samples directly analyzed without the mandatory use of suitable reference substances.
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