condition mean min max 12pM Fe 8.369435 8.23098 8.50789 58pM Fe 5.7138349999999996 5.63087 5.7968 233pM Fe 3.15362 3.15362 3.15362 1160pM Fe 4.723645059523809 4.4661558333333335 4.981134285714286 Dark 4.171936566666666 3.82144 4.522433133333333 Light 2.533721846153846 2.533721846153846 2.533721846153846 Phloroglucinol 6.52107 6.52107 6.52107