condition mean min max 12pM Fe 22.37055 20.1897 24.5514 58pM Fe 18.168135714285714 11.8248 24.51147142857143 233pM Fe 37.336 37.336 37.336 1160pM Fe 35.740945357142856 7.562915714285714 63.918975 Dark 52.57194 42.7557 62.38818 Light 21.672147692307693 21.672147692307693 21.672147692307693 Phloroglucinol 31.6406 31.6406 31.6406