condition mean min max 12pM Fe 13.107985000000001 5.31567 20.9003 58pM Fe 11.122725714285714 5.48748 16.757971428571427 233pM Fe 32.87146666666666 32.87146666666666 32.87146666666666 1160pM Fe 22.621497499999997 3.66327 41.579724999999996 Dark 46.53253 38.8699 54.19516 Light 21.421187692307694 21.421187692307694 21.421187692307694 Phloroglucinol 2.84422 2.84422 2.84422