condition mean min max 12pM Fe 15.6737775 7.9757549999999995 23.3718 58pM Fe 10.732371428571428 7.308442857142857 14.1563 233pM Fe 3.89142 3.89142 3.89142 1160pM Fe 6.957708154761905 2.854359166666667 11.061057142857143 Dark 7.172698 6.32973 8.015666 Light 5.476235615384615 5.476235615384615 5.476235615384615 Phloroglucinol 5.49237 5.49237 5.49237