condition mean min max 12pM Fe 37.37965 18.9531 55.8062 58pM Fe 36.007378571428575 28.350057142857143 43.6647 233pM Fe 9.6502 9.6502 9.6502 1160pM Fe 19.281586904761905 12.034316666666667 26.52885714285714 Dark 10.519699666666666 5.8776 15.161799333333333 Light 15.668518461538461 15.668518461538461 15.668518461538461 Phloroglucinol 27.1181 27.1181 27.1181