\begin{table}%t1
\caption {\label{relative_ratio_7180_5300_binary_ternary_mixtures}Peak position and relative intensity of the band around 7180~cm$^{-1}$ (referred to as BII) with respect to the band around 5300~cm$^{-1}$ (referred to as~BI).}
%\centering
\par
\begin{tabular}{l c c c}
\cline{1-4}
\hline\hline
\noalign{\smallskip}
Mixture & BI peak position & BII peak position & BII/BI \\
        &  (cm$^{-1}$)     &  (cm$^{-1}$)      &        \\
\hline 
CH$_{4}$:H$_{2}$O = 100:1                      & 5292  & 7181 & $0.24 \pm 0.04$ \\
CO:H$_{2}$O = 100:1                            & 5289  & 7160 & $0.22 \pm 0.06$ \\
N$_{2}$:H$_{2}$O = 100 : 1                       & 5303  & 7199 & $0.24 \pm 0.03$ \\
N$_{2}$:CH$_{4}$:H$_{2}$O = 100:10:3       & 5303  & 7195 & $0.30 \pm 0.09$ \\
N$_{2}$:CH$_{4}$:H$_{2}$O = 100:30:10      & 5302  &  -- &  -- \\
N$_{2}$:CH$_{4}$:H$_{2}$O = 100:200:100    & 5300  &  --  &  -- \\
\hline
\end{tabular}
\end{table}