condition mean min max 12pM Fe 78.199475 61.103049999999996 95.2959 58pM Fe 55.37485714285714 38.43271428571428 72.317 233pM Fe 33.2667 33.2667 33.2667 1160pM Fe 51.27144226190476 41.64994166666666 60.892942857142856 Dark 31.23934 29.93348 32.5452 Light 22.575896153846152 22.575896153846152 22.575896153846152 Phloroglucinol 35.1877 35.1877 35.1877