condition mean min max 12pM Fe 38.69105 37.406499999999994 39.9756 58pM Fe 42.259592857142856 36.188785714285714 48.3304 233pM Fe 65.0245 65.0245 65.0245 1160pM Fe 54.04145476190476 31.42834285714286 76.65456666666667 Dark 61.32747666666667 39.8757 82.77925333333333 Light 59.38543846153846 59.38543846153846 59.38543846153846 Phloroglucinol 23.8658 23.8658 23.8658