condition mean min max 12pM Fe 0.220044 0.0 0.440088 58pM Fe 0.24610171428571426 0.10279342857142856 0.38941 233pM Fe 0.7357063333333334 0.7357063333333334 0.7357063333333334 1160pM Fe 0.10010757738095238 0.08283957142857143 0.11737558333333334 Dark 1.9596859 1.0588718 2.8605 Light 0.9211499230769231 0.9211499230769231 0.9211499230769231 Phloroglucinol 0.0 0.0 0.0