condition mean min max 12pM Fe 0.128835 0.0 0.25767 58pM Fe 0.5305388571428571 0.438476 0.6226017142857143 233pM Fe 0.519502 0.519502 0.519502 1160pM Fe 2.9889374166666665 0.0 5.977874833333333 Dark 4.611016 0.0 9.222032 Light 1.7242116153846154 1.7242116153846154 1.7242116153846154 Phloroglucinol 1.19275 1.19275 1.19275