TBA value is a method for the analysis of certain carbonylic oxidation products
present in stored fats and oils and causing their rancidity. The content of reactive
substances is very small of the order of 10 - 2000 pg kg-l. therefore, the criteria of
precision common in trace analysis should be applied. Ivbreover, oxidized rancid fats and
oils are very complicated mixtures of many relatively unstable oxidation products which
decompose in various ways m heating, or may interfere with the reaction.