Table 1: Description of the sample. The neutral and molecular hydrogen column densities were taken from Ledoux et al. (2003). Both [Fe/H] and metallicity values were from this work and correspond to the values integrated over the systems. Metallicity was derived in all cases from [S/H], except for Q 1157+014 for which [S/H] determination was uncertain, so we used [Zn/H] instead.
Quasar $z_{\rm em}$ $z_{\rm abs}$ logN(H  I)a logN(H2) [Fe/H] Metallicity
0013-004 2.09 1.973 20.83 17.72 $-1.46\pm0.01$ $-0.68\pm0.03$
0405-443 3.00 2.595 20.90 18.16 $-1.30\pm0.10$ $-0.93\pm0.02$
0405-443 3.00 2.549 21.00 <13.9 $-1.49\pm0.01$ $-0.96\pm0.04$
0528-250 2.80 2.811 21.35 18.22 $-1.44\pm0.01$ $-1.07\pm0.01$
1037-270 2.31 2.139 19.70 <13.7 $-0.51\pm0.03$ $-0.19\pm0.02$
1157+014 1.99 1.944 21.80 <14.5 $-1.84\pm0.03$ $-1.41\pm0.02$

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