tiempo tratamiento concentracion 9.8 1 1 10.1 1 1 9.8 1 1 11.3 1 2 10.7 1 2 10.7 1 2 9.2 2 1 8.6 2 1 9.2 2 1 10.3 2 2 10.7 2 2 10.2 2 2 8.4 3 1 7.9 3 1 8.0 3 1 9.8 3 2 10.1 3 2 10.1 3 2