condition mean min max 12pM Fe 17.834575 14.7131 20.95605 58pM Fe 17.618121428571428 13.8 21.436242857142858 233pM Fe 40.8481 40.8481 40.8481 1160pM Fe 20.886560714285714 18.82527142857143 22.94785 Dark 26.337153999999998 24.8646 27.809708 Light 21.353053846153845 21.353053846153845 21.353053846153845 Phloroglucinol 18.4491 18.4491 18.4491