condition mean min max 12pM Fe 11.0932325 7.226765 14.9597 58pM Fe 5.513193571428571 5.235197142857143 5.79119 233pM Fe 3.20967 3.20967 3.20967 1160pM Fe 4.411911803571428 2.30091075 6.522912857142857 Dark 4.6334713333333335 3.9493726666666666 5.31757 Light 5.318175384615385 5.318175384615385 5.318175384615385 Phloroglucinol 2.96063 2.96063 2.96063