\begin{table}%t9
\caption{\label{table9}Ionic abundance ratios from permitted lines in PB~8$^{a}$.}
\small%\centerline
{
\begin{tabular}{cccc}
\hline\hline\noalign{\smallskip}
& & \mc{2}{c}{O$^{++}$/H$^+$} 	\\
\hline\noalign{\smallskip}
& & $I$($\lambda$)/$I$(H$\beta$) & X$^{+i}$/H$^+$ \\
Mult. & $\lambda_0$ & ($\times$10$^{-2}$) &  ($\times$10$^{-5}$) \\
\hline\noalign{\smallskip}
1$^{b}$& 4638.85		& 0.040~$\pm$~0.010	& 122	     		\\
& 4641.81			& 0.380~$\pm$~0.030	& 153	     		\\
& 4649.14			& 0.458~$\pm$~0.037	& 148	     		\\
& 4650.84			& 0.221~$\pm$~0.027	& 125	     		\\
& 4661.64			& 0.222~$\pm$~0.027	& 116	     		\\
& 4673.73			& 0.037:		& 113:          	\\
& 4676.24			& 0.184~$\pm$~0.024	& 210		      	\\
& Sum				& 			& {\bf 141}	   	\\
2& 4317.14$^{c}$		& 0.210~$\pm$~0.027	& -- 		      	\\
& 4319.63			& 0.081~$\pm$~0.021	& 112		      	\\
& 4325.76			& 0.036:		& 261:	       		\\
& 4336.83			& 0.054~$\pm$~0.019	& 183		      	\\	
& 4345.56$^{c}$		& 0.257~$\pm$~0.028	& -- 		      	\\
& 4349.43			& 0.197~$\pm$~0.026	& 100		      	\\
& 4366.89			& 0.199~$\pm$~0.026	& 260		      	\\
& Sum				& 			& {\bf 141}	   	\\
10$^{d}$& 4069.62		& 0.391~$\pm$~0.035	& 158     		\\
& 4069.89			&	*		& *            		\\	  
& 4072.15			& 0.265~$\pm$~0.029	& 109    		\\
& 4075.86			& 0.275~$\pm$~0.030	& 79      		\\
& 4085.11			& 0.086~$\pm$~0.022	& 191     		 \\
& 4092.93			& 0.038:		& 114:	     	 \\
& Sum				& 			& {\bf 113}	    	 \\ 
20$^{d}$& 4097.22$^{c}$	& 0.281~$\pm$~0.031	& -- 	    		\\
& 4110.79			& 0.147~$\pm$~0.025	& 601	    	\\
& 4119.22			& 0.087~$\pm$~0.022	& 97	    		\\
& Sum				& 			& {\bf 204} 	\\ 
3d--4f$^{d}$&4089.29	& 0.102~$\pm$~0.022	& 85	    		\\	
&4303.82$^{e}$		& 0.086~$\pm$~0.022	& 174	    		\\
&4609.44			& 0.033:		& 64:     		\\
& Average			& 			& {\bf 85}		\\ \hline 
& Adopted			& 			&{\bf 141~$\pm$~7} 		\\ 
\hline\noalign{\smallskip}
& & \mc{2}{c}{C$^{++}$/H$^+$} \\
\hline\
6& 4267.26	 		& 0.781~$\pm$~0.055	 & {\bf 69}   \\ 
 & Adopted	 		&			 &{\bf 69~$\pm$~5} \\
\hline\noalign{\smallskip}
& & \mc{2}{c}{N$^{++}$/H$^+$} \\
\hline
48& 4239.40			& 0.128~$\pm$~0.040	& {\bf 30} 	 \\
& Adopted			& 			&{\bf 30~$\pm$~6}\\ 
\hline\noalign{\smallskip}
& & \mc{2}{c}{Ne$^{++}$/H$^+$} \\
\hline 
57& 4391.94			& 0.062~$\pm$~0.020	& 15		\\
& 4409.30			& 0.061~$\pm$~0.020	& 24		\\
& Sum				& 			& {\bf 19}	  \\
& Adopted			& 			&{\bf 19~$\pm$~6 }               \\ 
\hline
\end{tabular}}
\smallskip
$^{a}$ Only lines with intensity uncertainties lower than 40\% have been considered (see text).\\
$^{b}$  Corrected from NLTE effects (see text).\\
$^{c}$  Blended with another line or affected by internal reflections or charge transfer in the CCD.\\
 $^{d}$  Recombination coefficients for intermediate coupling \citep{liuetal95}.\\
 $^{e}$  Blended with {\oii}~$\lambda$4303.61 line. 
\end{table}