Table 5 Values of pH of a siderophore solution (DFOM) and a mixture of four organic acids: citric, oxalic, tartaric and ketoglutaric acids (Mix) at different concentrations
From: Potential alteration of iron–humate complexes by plant root exudates and microbial siderophores
Extractant | Concentration | ||
|---|---|---|---|
0.01 M | 0.001 M | 0.0001 M | |
DFOM | 4.44 | 4.87 | 5.39 |
Mix | 1.98 | 2.68 | 3.44 |