# Authentication of a Painting Attributed to the Rembrandt School
## 2 The Experimental Part
### SEM-EDX Analysis
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Sample** & **Chemical Element** & **X-ray Spectra** & **Wt (\%)** & **Normal** & **Normal** & **Error** \\ \hline \multirow{8}{*}{\begin{tabular}{c} S6b \\ (area on the back of the sample, with preparation and traces of material) \\ \end{tabular} } & Lead & Series—K & 14.593 & 13.553 & 1.277 & 0.512 \\ \cline{2-6}  & Bariu & Series—K & 6.526 & 6.061 & 0.861 & 0.244 \\ \cline{2-6}  & Carbon & Series—K & 15.138 & 14.058 & 22.844 & 2.732 \\ \cline{2-6}  & Calcium & Series—K & 5.561 & 5.164 & 2.515 & 0.214 \\ \cline{2-6}  & Sulphur & Series—K & 1.681 & 1.561 & 0.950 & 0.175 \\ \cline{2-6}  & Aluminium & Series—K & **0.284** & **0.264** & **0.191** & **0.056** \\ \cline{2-6}  & Silicon & Series—K & **0.532** & **0.494** & **0.343** & **0.066** \\ \cline{2-6}  & Magnesium & Series—K & 1.973 & 1.832 & 1.471 & 0.179 \\ \cline{2-6}  & Oxygen & Series—K & 61.390 & **57.013** & **69.548** & **11.828** \\ \cline{2-6}  & & Total & **107.678** & **100** & **100** & \\ \hline \multirow{8}{*}{\begin{tabular}{c} S7 \\ (textile fabric area) \\ \end{tabular} } & Lead & Series—K & 5.806 & 5.806 & 0.457 & 0.249 \\ \cline{2-6}  & Barium & Series—K & 1.104 & 1.104 & 0.131 & 0.078 \\ \cline{2-6}  & Carbon & Series—K & 17.723 & 17.730 & 24.078 & 7.087 \\ \cline{2-6}  & Calcium & Series—K & 1.479 & 1.479 & 0.602 & 0.085 \\ \cline{2-6}  & Sulphur & Series—K & 0.459 & 0.459 & 0.233 & 0.086 \\ \cline{2-6}  & Phosphorus & Series—K & 0.035 & 0.035 & 0.018 & 0.031 \\ \cline{2-6}  & Aluminium & Series—K & **0.178** & **0.178** & **0.108** & **0.046** \\ \cline{2-6}  & Silicon & Series—K & **0.168** & **0.168** & **0.097** & **0.042** \\ \cline{2-6}  & Potassium & Series—K & 0.109 & 0.109 & 0.046 & 0.036 \\ \cline{2-6}  & Magnesium & Series—K & 0.354 & 0.354 & 0.238 & 0.065 \\ \cline{2-6}  & Oxygen & Series—K & **72.576** & **72.578** & **73.992** & **24.475** \\ \cline{2-6}  & Total & 99.991 & **100** & **100** & \\ \hline \multirow{8}{*}{\begin{tabular}{c} S8 \\ (zone I, on the basis with preparation) \\ \end{tabular} } & Carbon & Series—K & 20.732 & 20.733 & 26.757 & 7.341 \\ \cline{2-6}  & Calcium & Series—K & 1.094 & 1.094 & 0.423 & 0.079 \\ \cline{2-6}  & Sulphur & Series—K & 0.513 & 0.513 & 0.248 & 0.061 \\ \cline{2-6}  & Phosphorus & Series—K & 0.373 & 0.373 & 0.186 & 0.057 \\ \cline{2-6}  & Silicon & Series—K & **0.861** & **0.861** & **0.475** & **0.087** \\ \cline{2-6}  & Aluminium & Series—K & **1.295** & **1.295** & **0.744** & **0.122** \\ \cline{2-6}  & Sodium & Series—K & 3.540 & 3.540 & 2.387 & 0.348 \\ \cline{2-6}  & Magnesium & Series—K & 1.759 & 1.759 & 1.122 & 0.172 \\ \cline{2-6}  & Oxygen & Series—K & **69.831** & **69.832** & **67.658** & **23.360** \\ \cline{2-6}  & Total & **99.998** & **100** & **100** & \\ \hline \multirow{8}{*}{\
\begin{tabular}{c} S8 \\ (zone I, on the basis with preparation) \\ \end{tabular} } & Bariu & Series—K & 8.697 & 7.738 & 1.161 & 0.310 \\ \cline{2-6}  & Zinc & Series—K & 7.741 & 6.888 & 2.171 & 0.271 \\ \cline{2-6}  & Carbon & Series—K & 6.963 & 6.196 & 10.632 & 1.373 \\ \cline{2-6}  & Calcium & Series—K & 17.800 & 15.838 & 8.145 & 0.576 \\ \cline{2-6}  & Sulphur & Series—K & 4.821 & 4.290 & 2.757 & 0.233 \\ \cline{2-6}  & Silicon & Series—K & **0.562** & **0.500** & **0.367** & **0.074** \\ \cline{2-6}  & Aluminium & Series—K & **0.776** & **0.690** & **0.527** & **0.096** \\ \cline{2-6}  & Sodium & Series—K & 0.166 & 0.147 & 0.132 & 0.156 \\ \cline{2-6}  & Magnesium & Series—K & 0.607 & 0.540 & 0.458 & 0.099 \\ \cline{2-6}  & Oxygen & Series—K & **64.255** & **57.173** & **73.650** & **11.046** \\ \hline \multirow{8}{*}{
\begin{tabular}{c} S9 \\ (zone II, on the woodenassis, with traces of material) \\ \end{tabular} } & Total & **112.388** & **100** & **100** & \\ \cline{2-6}  & Aluminium & Series—K & **100** & **100** & \\ \cline{2-6}  & Aluminium & Series—K & **100** & **100** & \\ \cline{2-6}  & Sodium & Series—K & **100** & **100** & \\ \cline{2-6}  & Magnesium & Series—K & **100** & **100** & \\ \cline{2-6}  & Oxygen & Series—K & **100** & **100** & \\ \cline{2-6}  & Total & **100** & **100** & **100** & \\ \hline \hline \end{tabular}
\end{table}