condition mean min max 12pM Fe 13.8211875 4.2478750000000005 23.3945 58pM Fe 8.252520928571428 2.626241857142857 13.8788 233pM Fe 3.6485499999999997 3.6485499999999997 3.6485499999999997 1160pM Fe 25.14569289285714 1.1055715 49.18581428571429 Dark 7.080732333333334 6.817614666666667 7.34385 Light 24.05678023076923 24.05678023076923 24.05678023076923 Phloroglucinol 1.84971 1.84971 1.84971