condition mean min max 12pM Fe 14.05095 11.8583 16.2436 58pM Fe 12.936191428571428 8.62386 17.248522857142856 233pM Fe 6.22123 6.22123 6.22123 1160pM Fe 5.359222619047619 4.398936666666667 6.319508571428571 Dark 10.449948333333333 9.5023 11.397596666666667 Light 9.243143076923078 9.243143076923078 9.243143076923078 Phloroglucinol 6.64335 6.64335 6.64335