condition mean min max 12pM Fe 6.0027075 4.44355 7.561865 58pM Fe 3.989832857142857 2.32999 5.649675714285714 233pM Fe 10.03895 10.03895 10.03895 1160pM Fe 2.6296235714285716 1.0018111428571428 4.257436 Dark 10.169939 6.01717 14.322708 Light 7.067014230769231 7.067014230769231 7.067014230769231 Phloroglucinol 6.266923333333334 6.266923333333334 6.266923333333334