\section{Results and Template Demonstration}

\subsection{Two-Column Layout}

The two-column layout is implemented using the \texttt{multicol} package. The columns are separated by 1.5 cm of white space.

\subsection{Adding Figures}

Figure~\ref{fig:schematic} shows a schematic diagram of the electrochemical sensor setup:

\begin{figure}[H]
\centering
\includegraphics[width=0.85\linewidth]{figure1.png}
\caption{Three-electrode system: Working electrode (GO/GCE), Counter electrode (Pt), Reference electrode (Ag/AgCl).}
\label{fig:schematic}
\end{figure}

Figure~\ref{fig:calibration} shows the calibration curve for paracetamol detection:

\begin{figure}[H]
\centering
\includegraphics[width=0.85\linewidth]{figure2.png}
\caption{Calibration curve for paracetamol detection using GO/GCE modified electrode. The linear range is 0.5-100 \textmu M with correlation coefficient R$^2$ = 0.997.}
\label{fig:calibration}
\end{figure}

\subsection{Mathematical Formulas}

The mean and standard deviation are calculated as:

\begin{equation}
\bar{x} = \frac{1}{n}\sum_{i=1}^{n} x_i
\end{equation}

\begin{equation}
\sigma = \sqrt{\frac{1}{n-1}\sum_{i=1}^{n}(x_i - \bar{x})^2}
\end{equation}

The Randles-Sevcik equation:

\begin{equation}
i_p = (2.69 \times 10^5) n^{3/2} A D^{1/2} C \nu^{1/2}
\end{equation}

\subsection{Example Table}

Table~\ref{tab:performance} shows performance comparison data:

\begin{table}[H]
\centering
\small
\caption{Performance comparison of different methods}
\label{tab:performance}
\begin{tabular}{|l|c|c|c|}
\hline
\textbf{Method} & \textbf{Sensitivity} & \textbf{Specificity} & \textbf{Accuracy (\%)} \\
\hline
Method A & 0.95 & 0.92 & 93.5 \\
\hline
Method B & 0.97 & 0.94 & 95.2 \\
\hline
Method C & 0.93 & 0.96 & 94.8 \\
\hline
\end{tabular}
\end{table}

\subsection{TABLE INSTRUCTION GUIDE}

\tableinstruction

\subsection{Example with Fixed Width}

\begin{table}[H]
\centering
\small
\caption{Detailed experimental parameters}
\label{tab:fixed}
\begin{tabular}{|p{2.5cm}|p{4.5cm}|}
\hline
\textbf{Parameter} & \textbf{Description} \\
\hline
pH & 7.0 (optimum condition) \\
\hline
Temperature & 25\textdegree C (room temperature) \\
\hline
Scan rate & 50 mV/s \\
\hline
Accumulation time & 60 s \\
\hline
Detection limit & 0.12 $\mu$M \\
\hline
Linear range & 0.5 - 100 $\mu$M \\
\hline
\end{tabular}
\end{table}