condition mean min max 12pM Fe 0.18890775 0.0 0.3778155 58pM Fe 0.0 0.0 0.0 233pM Fe 0.454327 0.454327 0.454327 1160pM Fe 0.222888625 0.14311625 0.302661 Dark 0.760703 0.34071599999999996 1.18069 Light 3.5836498461538464 3.5836498461538464 3.5836498461538464 Phloroglucinol 0.303536 0.303536 0.303536