power/W concentration_640ppm/mM uncertainty_640ppm/mM concentration_6400ppm/mM uncertainty_6400ppm/mM 0 0.800 0.170 0.027 0.301 0.048 1 3.000 0.239 0.038 0.687 0.110 2 4.600 0.303 0.049 0.871 0.139 3 6.200 0.304 0.049 0.932 0.149 4 8.000 0.306 0.049 0.925 0.148 5 12.000 0.275 0.044 0.918 0.147