The repeatability values determined from a statistical analysis of the results (see
Tables 2 and 4) indicate that the determination of TBA value can be carried out at an
acceptable degree of precision. The TBA value determination may be affected by hydroperoxides,
oxygen, antioxidants, and trace metals. By observing the procedure carefully, and
by using chemicals of high purity, most of these influences can be eliminated or remain
constant, and fairly repeatable results are obtained.