condition mean min max 12pM Fe 4.29202 3.98447 4.59957 58pM Fe 5.2391435714285715 2.61089 7.8673971428571425 233pM Fe 3.4892600000000003 3.4892600000000003 3.4892600000000003 1160pM Fe 6.3014947023809516 4.171398571428571 8.431590833333333 Dark 5.589681933333333 2.53838 8.640983866666666 Light 6.667735923076923 6.667735923076923 6.667735923076923 Phloroglucinol 7.46068 7.46068 7.46068