condition mean min max 12pM Fe 6.0917275 2.71528 9.468175 58pM Fe 4.043755 1.80195 6.28556 233pM Fe 14.7173 14.7173 14.7173 1160pM Fe 2.99827544047619 2.5504451666666665 3.4461057142857143 Dark 32.19795466666667 31.304209333333333 33.0917 Light 37.563291538461534 37.563291538461534 37.563291538461534 Phloroglucinol 1.630197 1.630197 1.630197