condition mean min max 12pM Fe 19.1837 15.2473 23.1201 58pM Fe 14.924757857142858 8.64303 21.206485714285716 233pM Fe 19.5346 19.5346 19.5346 1160pM Fe 11.915120833333333 7.4896 16.340641666666667 Dark 8.354137 1.93565 14.772624 Light 8.274427692307693 8.274427692307693 8.274427692307693 Phloroglucinol 14.88283 14.88283 14.88283