  We use a sample of 37 H II regions with high quality spectra to study the
behavior of the relative abundances of several elements as a function of
metallicity. The sample includes spectra for eight H II regions of the
Magellanic Clouds, obtained with UVES/VLT; the rest are gathered from the
literature. We find that if we use the traditional twozone scheme of
temperature for the observed ions, the S/O, Cl/O and Ar/O abundance ratios
increase with metallicity. However, with slight changes in the temperature
structure, which include the use of intermediate temperatures, these ratios are
constant with metallicity, as expected. Therefore, high quality observations
allow us to deepen our understanding of the temperature structure of H II
regions.
