condition mean min max 12pM Fe 12.21893 10.02276 14.4151 58pM Fe 10.597376428571428 7.808152857142857 13.3866 233pM Fe 5.2624933333333335 5.2624933333333335 5.2624933333333335 1160pM Fe 7.467222678571429 6.9617225000000005 7.972722857142857 Dark 8.098618 5.3342 10.863036000000001 Light 8.141297846153847 8.141297846153847 8.141297846153847 Phloroglucinol 11.40159 11.40159 11.40159