\begin{table}%t6
%\centering
\par
\caption{ Total chemical abundances of \sexa\ and \sexb\ PNe computed with both ICF and CLOUDY methods. 
We also report the unweigthed average of the two results. Metal abundances are expressed in 12+$\log~$(X/H). \label{Tab_c_pn}} 
\begin{tabular}{lllllll} 
\hline\hline\noalign{\smallskip} 
Name  & He/H & N/H & O/H & Ne/H & S/H & Ar/H \\ 
\noalign{\smallskip} 
\hline 
\noalign{\smallskip} 
%icf 		 	 & 0.085$\pm$0.01 	& 8.4$\pm$0.1	 & 8.0$\pm$0.1 & 6.7$\pm$0.2   & 5.8$\pm$0.1 & 5.2$\pm$0.3\\  
%cloudy	    	 	 & 0.088$\pm$0.02	& 8.4$\pm$0.3	 & 8.1$\pm$0.1 & 6.7$\pm$0.2   & 5.8$\pm$0.2 & 5.2$\pm$0.2\\  
SexA-PN			 &			&		 &	       &        	&		&	\\
ICF 		         & 0.084~$\pm$~0.016	& 8.35~$\pm$~0.2	 & 8.1~$\pm$~0.1 & 6.6~$\pm$~0.2  & 5.8~$\pm$~0.1 & 5.2~$\pm$~0.4\\
CLOUDY	 	   	 & 0.095~$\pm$~0.02	& 8.4~$\pm$~0.2	 & 8.0~$\pm$~0.1 & 6.7~$\pm$~0.2   & 5.9~$\pm$~0.2 & 5.2~$\pm$~0.2\\
\par
Average 	 	 & 0.09~$\pm$~0.02 	& 8.4~$\pm$~0.2	 & 8.0~$\pm$~0.1 & 6.7~$\pm$~0.2   & 5.9~$\pm$~0.2 & 5.2~$\pm$~0.3\\  
\noalign{\smallskip} 
\hline
\noalign{\smallskip} 
%icf 		 	 & 0.09~$\pm$~0.02 	& 6.9~$\pm$~0.3	 & 8.0~$\pm$~0.2 & 7.1~$\pm$~0.3        & -		& -              \\  
%cloudy	 		 & 0.10~$\pm$~0.02	& 6.7~$\pm$~0.3	 & 7.9~$\pm$~0.2 & 6.9~$\pm$~0.2	    &-		&-\\ 
SexB-PN1		 &			&		 &		&		&		&	\\
ICF			 & 0.099~$\pm$~0.015	& 6.7:		 & 8.0~$\pm$~0.15	& 7.2~$\pm$~0.3	&--		&--	\\
CLOUDY			 & 0.10~$\pm$~0.02	& 6.6:		 & 8.1~$\pm$~0.3	& 7.3~$\pm$~0.3	&--		&--	\\		
\par
Average 	 	 & 0.10~$\pm$~0.02 	& 6.6:		 & 8.1~$\pm$~0.2  & 7.3~$\pm$~0.3   & --		& --     \\ 
\hline  
%icf		 	 & 0.06~$\pm$~0.03 	& 6.8~$\pm$~0.3	 & 7.8~$\pm$~0.3 & 6.7~$\pm$~0.3        & -		& -                  \\ 
%cloudy	 	 	 & 0.07~$\pm$~0.02	& 6.7~$\pm$~0.3	 & 8.0~$\pm$~0.2 & 6.8~$\pm$~0.2	    & -		& -	\\ 
SexB-PN2		 &			&		 &		&		&		&	\\
ICF			 & 0.096~$\pm$~0.016 	& 6.7:		 & 7.7~$\pm$~0.3	& 6.8~$\pm$~0.2	&--		&--	\\
CLOUDY		 	 & 0.11~$\pm$~0.02	& 6.6:		 & 8.0~$\pm$~0.2	& 7.0~$\pm$~0.3	&--		&--	\\
\par
Average	 		 & 0.10~$\pm$~0.02	& 6.6:		 & 7.8~$\pm$~0.2  & 6.9~$\pm$~0.3	& --		& --	\\ 
\hline 
%icf 		 	 & 0.08~$\pm$~0.01 	& $>$5.4$\dag$   & 7.6~$\pm$~0. & 6.9~$\pm$~0.3        & 5.2~$\pm$~0.2     & 5.5~$\pm$~0.3   \\  
%cloudy   		 & 0.09~$\pm$~0.02	& 6.5~$\pm$~0.3	 & 7.8~$\pm$~0.2 & 7.1~$\pm$~0.2	    & 5.2~$\pm$~0.2     & 5.5~$\pm$~0.2	\\ 
SexB-PN3		 &			&		 &		&		&		&	\\
ICF		         & 0.076~$\pm$~0.016 	& $>$5.5$\dag$	 & 7.5~$\pm$~0.3  & 6.9~$\pm$~0.3	& $>$4.9$\dag$	& 5.7~$\pm$~0.2\\
CLOUDY			 & 0.09~$\pm$~0.02	& 6.5~$\pm$~0.3	 & 7.6~$\pm$~0.2  & 7.1~$\pm$~0.2	& 5.2:		& 5.5~$\pm$~0.2\\
\par
Average	 	   	 & 0.08~$\pm$~0.02	& 6.5~$\pm$~0.3    & 7.5~$\pm$~0.2  & 7.0~$\pm$~0.2	& 5.2:		& 5.6~$\pm$~0.2	\\ 
\hline 
%icf 	 	 	 & 0.08~$\pm$~0.02 	& 7.0~$\pm$~0.3	 & 8.3~$\pm$~0.3 & 7.0~$\pm$~0.3        & 5.4~$\pm$~0.2	& -     \\  
%cloudy  		 & 0.09~$\pm$~0.02	& 7.4~$\pm$~0.3	 & 8.3~$\pm$~0.2 & 7.1~$\pm$~0.2	    & 	& -	\\ 
SexB-PN4		 &			&		 &		&		&		&	\\
ICF	  		 & 0.095~$\pm$~0.014	& 6.8~$\pm$~0.3    & 8.3~$\pm$~0.1 	& 7.4~$\pm$~0.1	& 5.3~$\pm$~0.2		& --	\\
CLOUDY			 & 0.09~$\pm$~0.02	& 6.3~$\pm$~0.3	 & 8.2~$\pm$~0.2	& 7.4~$\pm$~0.2	& 5.2~$\pm$~0.2	        & 5.1:\\
\par
Average 	  	 & 0.09~$\pm$~0.02	& 6.5~$\pm$~0.3    & 8.2~$\pm$~0.2  & 7.4~$\pm$~0.2	& 5.2~$\pm$~0.2		& 5.1:	\\ 
\hline 
%icf 		 	 & 0.12~$\pm$~0.02 	& 8.0~$\pm$~0.3    & 8.2~$\pm$~0.1 & 7.5~$\pm$~0.2	    & 5.9~$\pm$~0.2	& -     \\
%cloudy   		 & 0.14~$\pm$~0.02  	& 8.0~$\pm$~0.3	 & 8.3~$\pm$~0.2 & 7.5~$\pm$~0.2	    & 5.9~$\pm$~0.2	& -	\\ 
SexB-PN5		 &			&		 &		&		    &		&	\\
ICF	 		 & 0.13~$\pm$~0.02	& 7.5~$\pm$~0.3	 & 8.2~$\pm$~0.1 	& 7.6~$\pm$~0.2	   & 5.4~$\pm$~0.2	        &--	\\
CLOUDY			 & 0.13~$\pm$~0.02	& 7.0~$\pm$~0.3	 & 8.2~$\pm$~0.2	& 7.6~$\pm$~0.2	   & 5.7~$\pm$~0.2	&-- 	\\
\par
Average 	 	 & 0.13~$\pm$~0.02 	& 7.3~$\pm$~0.3	 & 8.2~$\pm$~0.1  & 7.6~$\pm$~0.2	   & 5.5~$\pm$~0.2	& --     \\  
 \noalign{\smallskip} 
\hline 
\noalign{\smallskip} 
%Average \sexb & icf    &0.08~$\pm$~0.02	&-		&7.9~$\pm$~0.3	&7.2~$\pm$~0.4&	-	   &-\\ 
Average \sexb             &0.10~$\pm$~0.02	& 6.8~$\pm$~0.6	 &8.0~$\pm$~0.3	&7.3~$\pm$~0.3&	5.3~$\pm$~0.4&--\\ 
\hline 
\end{tabular} 
\end{table}